Curated Resources

A classified set of learning links from the supplied resource list. The page keeps regular markdown rendering so it stays easy to scan, copy, and maintain.

Documentaries

• Official YT Documentary Channels - YouTube Documentary Channels.
• Documentary+ - Documentary and educational video resource.
• YT Video Essay Hall of Fame - YouTube Video Essay Archive.
• LearnOutLoud - Documentary and educational video resource.
• Top Documentary Films - Documentary and educational video resource.
• Thought Maybe - Documentary and educational video resource.
• Media Burn Archive - Documentary and educational video resource.
• ARTE - Documentary and educational video resource.
• PBS - Documentary and educational video resource.
• National Geographic - Documentary and educational video resource.
• Folkstreams - Documentary and educational video resource.
• Films For Action - Documentary and educational video resource.
• r/Documentaries - Documentary and educational video resource.
• NASA+ - Official NASA Streaming Service.

Courses

Streaming

• Limnology - Educational YouTube Channels.
• edX - Courses.
• MitOpenCourseWare - Courses.
• Khan Academy - Courses.
• Class Central - Search for Courses.
• Course CSE - Multi-Site Course Search.
• OpenLearn - Courses.
• Alison - Courses.
• Saylor Academy - Courses.
• EbookFoundation Courses - Courses.
• OpenCulture - Courses.
• DigitalGarage - Google Courses.
• OpenHPI - Courses.
• OLI - Courses.
• Video Lectures - Lectures.
• Yale Courses - Lectures.
• Gresham College - Lectures.
• Paul G. Allen School - Lectures.
• Crash Course - Topic Crash Courses.

Learning Sites

• Learn Anything - Learning Resource Search.
• Wakelet - Learning Resources.
• OpenCulture - Learning Resources.
• The Borr Project - Learning Resources.
• OSSU - Learning Resources.
• The Free Learning List - Learning Resources.
• Awesome Educational Games - Educational Games Index.
• PhET - Interactive Lessons.
• Project Lumen - Interactive Lessons.
• Cognito - Interactive Lessons.
• Academo - Interactive Lessons.
• r/educationalgifs - Learn with GIFs.
• r/explainlikeimfive - Have Anything Explained Very Simply.
• The Punctuation Guide - Punctuation Guide.
• Basic Knowledge 101 - Knowledgebase.
• media.ccc.de - Educational Presentations.
• Ted Talks - Inspiring and Educational Talks.
• Stack Exchange - Q&A Communities.
• Explorabl.es - Quizzes.
• MinuteLabs - Quizzes.
• Wikiversity - Quizzes.
• Learnamic - Quizzes.
• Learn About - Google's Educational Search AIs.
• Learning Coach - Google's Educational Search AIs.
• AFAIK - Learning Map.
• simloops - Educational Simulations.
• AnimaGraffs - Animated Infographs.
• Memory Toys - Memory Tests.
• Memory League - Memory Tests.
• Dual N-Back - Memory Tests.
• BrainScale - Memory Tests.
• Art of Memory - Memory Improvement Book, Games, and Forums.
• Information Is Beautiful - Data.
• sheets.works - Data.
• HalcyonMaps - Data.
• r/coolguides - Guides & Tutorials.
• coolguid.es - Guides & Tutorials.
• HowStuffWorks - Learn How Things Work.
• Astral Codex Ten (ACX) - Science, Psychology, and Philosophy Blog.
• Read Scott Alexander - Science, Psychology, and Philosophy Blog.
• Common Misconceptions - Common Misconception Index.
• LitCharts - Literature Guides.
• Appropedia - Sustainability Wiki.
• British & Exotic Mineralogy - Mineralogy Database.
• ShipSpotting - Ship Index.
• Alchemy Forums - Alchemy Forum.
• P2PU - Join Learning Groups Using Free Courses.

Virtual Tours

• Virtual Museum Resources - Online Museums.
• CityHop - Travel Simulators.
• Travel Remotely - Travel Simulators.
• Portal Generator - Travel Simulators.
• Walk with Feel - Travel Simulators.
• Outside Simulator - Travel Simulators.
• Japan Walkaround - Travel Simulators.
• CityWalks - Travel Simulators.
• Citywalki - Travel Simulators.
• Virtual Vacations - Travel Simulators.
• Gez.la - Virtual Tours Map.
• Wiki Spaces - Virtual Tours.
• Musei Vaticani - Virtual Museum Tours.
• Natural History Museum - Natural History Museum Virtual Tour.
• Digital Giza - Great Pyramid Virtual Tours.
• Persepolis Reimagined - Explore Persepolis Recreation.
• BelowTheSurface - Archeological Object database of Amsterdam.
• WW2 in 100 Objects - WW2 Museum Virtual Tour.
• Spitfire Panorama - Spitfire Mark IX Cockpit Interactve Panorama.
• Virtual Vist Tours - Ireland Virtual Tours.
• Virtual Yosemite - Virtual Yosemite Tour.
• Matterport - Explore Real Places Digitally.
• Basilica Viewer - St. Peters Basilica Tour.
• 360Cities - 360 Images.
• Tas360 - 360 Images.
• Airpano - 360 Images.
• Smithsonian 3D - Smithsonian 3D Digitization Museum.
• National Palace Museum - National Palace Museum Virtual Tours.
• The Bayeux Tapestry - Bayeux Tapestry 3D Digitization.

Science and Math

• TIB AV-Portal - Science Videos.
• LabXchange - Interactive Science Simulations.
• JavaLab - Interactive Science Simulations.
• EduMedia - Interactive Science Simulations.
• MagnifiedSand - Microscopic Sand Magnification Database.
• BOINC - Donate Idle GPU + GPU Resources to Scientific Research.
• Number Theory - Donate Idle GPU + GPU Resources to Scientific Research.
• Humanitarian - Donate Idle GPU + GPU Resources to Scientific Research.

Physics

• Physics Aviary - Physics Tools.
• Falstad - Physics Tools.
• The Feynman Lectures - Physics Lectures.
• Bartosz Ciechanowski - Physics Lessons.
• Isaac Physics - Physics Lessons.
• PhysicsClassroom - Physics Lessons.
• HyperPhysics - Physics Lessons.
• MotionMountain - Physics Lessons.
• Splung - Physics Lessons.
• Physics Simulations - Physics Simulations.
• Mujoco - Physics Simulations.
• Physics Animations - Physics Simulations.
• oPhysics - Physics Simulations.
• MyPhysicsLab - Physics Simulations.
• LibreTexts Physics - Physics Learning.
• nLab Physics - Physics Encyclopedia.
• Algodoo - Interactive Physics Tool.
• QPaths - Learn Basic Quantum Terms.
• quantum - Quantum Physics Learning App.
• Physics Forums - Physics.
• Unihedron - Electromagnetic Radiation Spectrum Chart.
• Quantum Web Directory - Science.
• Virtual-Lab - Interactive Quantum Computing Lessons.
• Interactive 4D Handbook - Interactive Fourth Dimension.
• Ray Optics Simulation - Light Reflection.
• Compare Pendulum - Pendulum Simulators.
• DoublePendulum - Pendulum Simulators.
• OpenFoam - Fluid Dynamics Simulators.
• PC Progress - Fluid Dynamics Simulators.
• Fluid Simulation WebGL - Fluid Dynamics Simulators.
• WebGL Fluid Experiment - Fluid Dynamics Simulators.
• OpenFOAM - Fluid Dynamics Simulators.
• Sim Flow - Fluid Dynamics Simulators.
• SimScale - Fluid Dynamics & Heat Transfer.
• CFDTool - Fluid Dynamics & Heat Transfer.
• Bouncy Balls - Ball Physics Simulator.
• Balls Simulation - Ball Physics Simulator.
• WebGL Water - Water Simulation.
• LAMMPS - Molecular Dynamics (MD) Code.
• avogadro - Molecular Viewers.
• MolView - Molecular Viewers.
• Simuwaerm - Heat Simulator.

Math

• Awesome Math - Math Resources.
• Math Resources - Math Resources.
• Math and Science Lectures - Index of Math + Science Video Courses.
• Number Academy - Encyclopedia of Numbers.
• Wumbo - Math Reference Site.
• The Borr Project - Math Roadmaps.
• OSSU Math - Math Roadmaps.
• PT-BR - Math Roadmaps.
• AoPS Alcumus - Adaptive Problem Solving.
• MathDash - Adaptive Problem Solving.
• BetterExplained - Math Guides.
• Pauls Online Math Notes - Math Practice.
• Immortal's Maths Problems - Math Practice.
• Evan Chen - Math Practice.
• LibreTexts Math - Math Practice.
• Manim - Generate Explanatory Math Videos.
• Videos - Generate Explanatory Math Videos.
• Difference Between Versions - Generate Explanatory Math Videos.
• WolframAlpha - Searchable Knowledge Base.
• Wolfram MathWorld - Mathematics Encyclopedias.
• nLab Math - Mathematics Encyclopedias.
• Algebrica - Mathematical Concept Databases.
• PlanetMath - Mathematical Concept Databases.
• Red Blob Games - Interactive Math Sites.
• Mathspad - Interactive Math Sites.
• Matthen - Math Animations.
• Mathematical Olympiads - Math learning and reference resource.
• Mathcha - Online Math Editors.
• Corca - Online Math Editors.
• SequenceDB - Sequence Machine.
• Erich's Packing Center - Geometric Packing Problem Archive.
• OEIS - Encyclopedia of Integer Sequences.
• ProofWiki - Mathematical Proofs Encyclopedia.
• Giac/Xcas - Algebra System.
• Algebra Rules - Learn Algebra Rules.
• Linear Algebra Done Right - Linear Algebra Book.
• Calculus Made Easy - Learn.
• Stitz Zeager - Learn.
• CLP - Calculus Textbooks.
• Mathematics Roadmap - Mathematics Book Recommendations.
• Learn Mathematics - Mathematics Book Recommendations.
• Converter Pro - Unit Converters.
• Rink - Unit Converters.
• Frink - Unit Converters.
• OneConverter - Unit Converters.
• ConvertAll - Unit Converters.
• MathJax - JavaScript Math Display.
• ISciDAVis - Scientific Data Plotter.
• MathOnline - Math.
• CEMC - Math.
• Mathigon - Math.
• Professor Leonard - YouTube Math Lessons.
• Art of Problem Solving - YouTube Math Lessons.
• Flipped Mastery - YouTube Math Lessons.
• 3Blue1Brown - YouTube Math Lessons.
• MisterWootube - YouTube Math Lessons.
• Mathispower4u - Math Lessons.
• Andy Math - Math Lessons.
• SchoolYourself - Math Lessons.
• mathhelp - Math Lessons.
• MathPortal - Math Lessons.
• MadAsMaths - Math Lessons.
• Math Planet - Math Lessons.
• CoolMath - Math Lessons.
• Coolmath Games - Math Games.
• Cut The Knot - Math Equations.
• MathNet - Math Equations.
• IXL Learning - Math Practice.
• HSC Maths By Topic - HSC Math Practice.
• ParkMath - Math Guides.
• FreeMathHelp - Math Guides.
• Fourier Transform - Interactive Fourier Transform Guide.
• Terence Tao Research - Mathematical Research.
• Open Logic Project - Math Logic Teaching Materials.
• Math is Fun - Math Tutorials.
• Brainstellar Puzzles - Puzzles from Quant Interviews.
• Project Euler - Math.
• LibreTexts Statistic - Statistic Practice.
• IMS - Introduction to Modern Statistics.
• Seeing Theory - Statistics & Probability Tutorials.
• Stat Trek - Statistics & Probability Tutorials.

Engineering

• The Engineering Toolbox - Engineering Resources.
• EngineersEdge - Engineering Resources.
• r/EngineeringStudents Resources - Engineering Student Resources.
• Awesome Mecheng - Mechanical Engineering Resources.
• Awesome Electronics - Electronic Engineering Resources.
• Engineering Blogs - Engineering Blogs.
• r/AskEngineers - Engineering Subreddits.
• Wiki - Engineering Subreddits.
• r/engineering - Engineering Subreddits.
• r/AutomotiveEngineering - Engineering Subreddits.
• NPTEL - Engineering Courses.
• Sabin - Engineering Courses.
• KiCad - Schematics Editor.
• Libraries - Schematics Editor.
• Horizon EDA - Schematics Editor.
• IEEE Spectrum - Engineering Magazine.
• Formulia - Engineering Formulas.
• BOMwiki - Product Blueprint Components Database.
• X - Product Blueprint Components Database.
• Sanfoundry - Engineering Questions & Answers.
• SendCutSend Education - CAD Engineering Study Guide.
• X - CAD Engineering Study Guide.
• SOLIDWORKS Practice Problems - CAD Engineering Practice Exercises.
• X - CAD Engineering Practice Exercises.
• Tinkercad - Educational CAD Modeling.
• LibreTexts Engineering - Engineering Learning.
• Lunchbox Sessions - Interactive Mechanical.
• CESDB - Engineering Software.
• LavTeam - Engineering Software.
• Animated Engines - Engine Animations.
• 507 Movements - Mechanical Movement Animations.
• Robot Shop - Robotics Forum.
• VisRo Robotics - Robotics Learning.
• VittaScience - Robotics Learning.
• Humanity's Last Machine - Humanoid Robotics Hardware & Supply Chain Analysis.
• Humanoid Atlas - Humanoid Robotics Hardware & Supply Chain Analysis.
• Cyberbotics - Robot Simulator.
• Wokwi - Arduino.
• HDLBits - Learn Circuit Design.
• Falstad - Electronic Circuit Design.
• Fritzing - Electronic Circuit Design.
• SKiDL - Electronic Circuit Design.
• atopile - Electronic Circuit Design.
• EasyEDA - Electronic Circuit Design.
• LibrePCB - Electronic Circuit Design.
• The Pinouts Book - Pinout Function Reference Guide.
• Circuit Steps - Circuit Analysis Tool.
• BatteryUniversity - Learn About Batteries.
• Datasheet4U - Electronic Components Datasheet.
• Electronics Tutorials - Electronic Guides.
• Instrumentacion - Electronic Guides.
• Hacker Fab - Semiconductor Documentation.
• RetroSix - Retro Console Repair Guides + Info.
• /m/engineering - Engineering Multireddit.
• McMaster - Free 3D Printable Hardware Parts + Tools.
• 3D Find It - Free 3D Printable Hardware Parts + Tools.
• Build List - On-Demand Online Manufacturers.
• USA Parts Made Fast - On-Demand Online Manufacturers.
• X - On-Demand Online Manufacturers.

Chemistry

• Wolfram Alpha Chemistry - Chemistry Calculators.
• Lab Safety Guide / Intro - Chemistry learning and reference resource.
• LibreTexts Chemistry - Chemistry Texts.
• Internet Chemistry - Chemistry Search Index.
• Chemistry Basics - Basics of General, Organic, and Biological Chemistry.
• ChemicalAid - Chemistry Calculators.
• WebQC - Chemistry Calculators.
• Chemequations - Chemistry Calculators.
• QuickChem - Chemistry Calculator.
• PubChem - Chemistry Wikis.
• MOTM - Chemistry Wikis.
• NIST - Chemistry Wikis.
• Video-Tutor - Chemistry Lessons.
• YT - Chemistry Lessons.
• Tyler DeWitt - Chemistry Lessons.
• Allery Chemistry - Chemistry Lessons.
• Khan Academy AP Chemistry - Chemistry Lessons.
• Organic Chemistry etext - Chemistry Lessons.
• PeriodicVideos - Chemistry Lessons.
• ChemistrySteps - Chemistry Practice.
• ChemQuiz - Chemistry Practice.
• Science Geek - Chemistry Practice.
• DocBrown - Chemistry Practice.
• Cliffnotes Chemistry - Study Guides ReactionFlash.
• Organic Chemistry I - Study Guides ReactionFlash.
• Organic Chemistry II - Study Guides ReactionFlash.
• chemguide - Study Guides ReactionFlash.
• ReactionFlash - Study Guides ReactionFlash.
• iOS - Study Guides ReactionFlash.
• Compound Interest - Chemistry Infographics.
• ChemistryTalk - Tutorials.
• Sciencenotes - Periodic Tables.
• Organic Chemistry - Organic Reactions.
• Synarchive - Organic Reactions.
• CommonOrganicChemistry - Common Reactions.
• name-reaction - List of Name Reactions.
• ChemTube3D - Interactive 3D Chemistry Animations.
• ChemSpider - Chemical Structures.
• Merck Index - Online Merck Index.
• Organic Chemistry Data - Organic Chemistry Data.
• IGOC - Illustrated Glossary of Organic Chemistry.
• Colorado Chemistry Simulations - Chemistry Animations.
• Chemical Forums - Chemistry Forums.
• Arkivoc - Journals.
• WebQC Balance Calculator - Chemical Equation Balance Calculator.
• Chemexper Chemical Directory - Chemical Directory.
• OrgSyn - Chemistry Prep Guides.

Periodic Tables

• Ptable - Interactive Table.
• Zperiod - Interactive Table.
• Images-of-elements - Element Images.
• periodic-table.org - Material.
• Material Properties - Material.
• Atom Animation - 3D Visualizations of Atoms.
• Graph Overflow - 3D Visualizations of Atoms.
• 3D Periodic Table - 3D Visualizations of Atoms.
• Atomic - Periodic Table Mobile App.
• periodic-table.io - Interactive Table.
• Periodic Table App - Interactive Table.
• WebElements - Interactive Table.
• Photographic Periodic Table - Image-Based Periodic Table w.

Biology

• Wikispecies - Species Databases.
• The Catalogue of Life - Species Databases.
• Animalia - Animal Encyclopedia.
• A-Z Animal - Animal Encyclopedia.
• OneZoom - Tree of Life Explorer.
• Lost and Found Nature - Rediscovered Animal.
• Wayne's Word - Biology and Botany Information.
• Biology Online - Biology Articles.
• LibreTexts Biology - Biology Learning.
• Project Alveus Sanctuary - 24.
• BioNinja - IB Biology Reference.
• The Biology Project - Biology Problem Sets & Tutorials.
• Biodiversity Heritage Library - Biodiversity Research.
• Alien - Artificial Life Simulator.
• Video - Artificial Life Simulator.
• Metazooa - Species Connection Game.
• Phenome10K - Biological.
• RecentlyExtinctSpecies - Recently Extinct Species Database.
• UniProt - Protein Database.
• iNaturalist - Organism Identification.
• Ocearch - Track Marine Life.
• The Deep Sea - Interactive Deep Sea Life Guide.
• Marine Biodiversity - Bangladesh Marine Species Encyclopedia.
• Pattern Radio - Listen to Whale Songs.
• eBird - Bird Species Databases.
• Audubon - Bird Species Databases.
• AllAboutBirds - Bird Species Databases.
• BirdLife DataZone - Bird Conservation Information.
• EuroBirdPortal - European Bird Distribution Map.
• BirdSounds - Thousands of Bird Sounds Visualized.
• Merlin - Bird Picture.
• whoBIRD - Bird Picture.
• Featherbase - Bird Feather Database.
• BugGuide - Insect Identification Community.
• AntWeb - Ant Species Database.
• Spider ID - Spider Species Database.
• Macroinvertebrates - Freshwater Macroinvertebrates Atlas.
• Life Under the Ice - View Antarctic Microbes.
• WhyDoCatsAndDogs...? - Pet Q&A Site.
• Backyard Chickens - Chicken Raising Forum.
• Pteros - Pterosaur Database.
• WFO - Plant Database.
• The Ferns - Tropical Plant Database.

Med School

• r/MedicalSchool Wiki - Med School Resources.
• Khan Academy - Physiology.
• Radiopaedia - Radiology Resources.
• Radiology Assistant - Radiology Resources.
• Radiology Education - Radiology Resources.
• Stop the Bleed - Free First Aid Video Courses.
• MDCalc - Medical Reference Sites.
• MSD Manuals - Medical Reference Sites.
• Epocrates - Medical Reference Sites.
• Geeky Medics - Clinical Guides.
• UC San Diego CG - Clinical Guides.
• Easy Auscultation - Clinical Guides.
• LibreTexts Med - Medical Learning.
• Get Body Smart - Anatomy Guides.
• University of Michigan Anatomy - Anatomy Guides.
• Zygote Body - 3D Human Anatomical Models.
• AnatomyLearning - 3D Human Anatomical Models.
• BioDigital - 3D Human Anatomical Models.
• Inner Body - Anatomy Atlas (2D&3D).
• NIH Print - Biomedical Science 3D Models.
• Sectional Anatomy - Cross Sectional Educational MRI.
• University of Minnesota Histology - Histology Guides.
• Tulane University Pharmacology - Pharmacology Info & Quizzes.
• Antibiotics Summary - Antibiotics Summary Image.
• Healio ECG Review - ECG Information.
• Litfl - ECG Information.
• The ECG Course - ECG Video Course.
• ECG Wave-Maven: Self-Assessment Program - ECG Practice.
• Hyper Heart - Massey University Heart Animation.
• Emergency Medicine Cases - EM Case Index.
• EMCrit - Emergency Medicine Information.
• DeployedMedicine - Combat Medicine Guide.
• TCCC - Combat Medicine Guide.
• EMRap - Emergency Medicine Videos.
• Calgary Guide - Disease Pathophysiology.
• MalaCards - Human Disease Database.
• Folding@home - Donate Idle PC to Disease Research.
• Epidemic Calculator - COVID Data.
• Pathology Outlines - Pathology Info.
• University of Utah Pathology - Pathology Guide.
• The Iowa Virtual Slidebox - Pathology Atlas Software.
• Nextstrain - Pathogen Evolution Tracking.
• HemOnc - Hematology.
• DermNet - Dermatology Reference Site.
• EyeWiki - Eye Encyclopedia.
• Passmedicine - UCAT Practice Questions.
• UCAT Score - UCAT Score Converter.
• r/medicalschoolanki - Community for Medical Anki Cards.
• CRAM - Medical Flashcards.

Space

• r/Space - Space Subreddit.
• Space Dashboard - Space Live Stream Dashboard.
• NASA - National Aeronautics and Space Administration Website.
• Images - National Aeronautics and Space Administration Website.
• Audio - National Aeronautics and Space Administration Website.
• Documents - National Aeronautics and Space Administration Website.
• APIs - National Aeronautics and Space Administration Website.
• History - National Aeronautics and Space Administration Website.
• March to the Moon - Apollo (Missions) Images.
• Apollo Image Atlas - Apollo (Missions) Images.
• ApolloArchive - Apollo (Missions) Images.
• Flickr - Apollo (Missions) Images.
• Apollo in Realtime - Interactive Apollo Missions.
• FirstMenOnTheMoon - Interactive Apollo Missions.
• Artemis II Photo Timeline - Artemis II Photo & Video Timeline.
• Marspedia - Mars Wiki.
• ESA - European Space Agency Website.
• X - European Space Agency Website.
• JAXA - Japanese Space Agency Website.
• Images / Videos - Japanese Space Agency Website.
• CSA - Canadian Space Agency Website.
• ISRO - Indian Space Research Organization.
• Space.com - Space News.
• Russian Space Web - Russian Space Program News.
• X - Russian Space Program News.
• Mental Landscape - Soviet Space Exploration Archive.
• X - Soviet Space Exploration Archive.
• Encyclopedia Astronautica - Space Encyclopedia.
• NASA History - NASA Books.
• X - NASA Books.
• NASA Ebooks - NASA Books.
• Ask an Astronaut - Astronaut Interview Q&A Search.
• Cosmos2025 - Interactive Universe Scales.
• Map of the Universe - Interactive Universe Scales.
• Scale of the Universe - Interactive Universe Scales.
• AndroidCelestia - Interactive Universe Scales.
• SpaceEngine - Interactive Universe Scales.
• NASA's Eyes - 3D Space Visualizations.
• Celestia - 3D Space Visualizations.
• Solar System - 3D Space Visualizations.
• X - Aerial Photography Community.
• TheCMB - 3D Cosmic Microwave Background Model.

Astronomy

• Astronomy Resources - Astronomy Resources.
• NASA2Explore - Astronomy Images.
• ESO Images - Astronomy Images.
• Astrobin - Astronomy Images.
• JPL Photojournal - JPL Planetary Image Archives.
• JPL Images - JPL Planetary Image Archives.
• In The Sky - Astronomy News.
• ViewSpace - Space Videos and Digital Interactives.
• Planet Globe - Virtual Globes.
• Sky Calendar - Astronomy Calendar.
• Nights on Earth - Astronomical Event Calendar.
• Space Weather News - Space Weather Updates.
• SolarHam - Space Weather Updates.
• SpaceWeather - Space Weather Updates.
• Videos - Space Weather Updates.
• SunCalc - Sun.
• ShadeMap - Sun.
• MoonCalc - Sun.
• Earth and Moon Viewer - Earth.
• SDO Dashboard - Live Sun Feed.
• WikiSky - Interactive Star Visualizations.
• SkyViewer - Interactive Star Visualizations.
• 100,000 Stars - Interactive Star Visualizations.
• CelesTrack - Earth Orbit Visualization.
• TheSkyLive - Solar System Simulators.
• Solar System Scope - Solar System Simulators.
• Atlas of Space - Solar System Simulators.
• Space Object Comparison - Compare Sizes Of Celestial Objects.
• 1 Pixel moon - Solar System Scale Model.
• LightYear - Solar System Scale Model.
• OMG SPACE - Solar System Scale Model.
• Astrogeology - Planetary Maps.
• ExoplanetExplore - Interactive Exoplanet Visualization.
• ExoplanetArchive - Exoplanet Database.
• AndroidPlanisphere - Android Star Chart.
• Aladin - Astronomical Image quar fViewer.
• Lite Version - Astronomical Image quar fViewer.
• Siril - Astronomical Image Processor.
• ESAsky - Public Astronomical Data.
• Stellarium-Web - Virtual Stellariums.
• Stellarium - Virtual Stellariums.
• WorldwideTelescope - Interactive Telescope Data.
• Home Page - Interactive Telescope Data.
• ESA Hubble - Hubble Telescope Images.
• X - Hubble Telescope Images.
• SpaceTelescopeLive - Hubble Telescope Images.
• X - Hubble Telescope Images.
• HubbleSite - Hubble Telescope Images.
• X - Hubble Telescope Images.
• James Webb Space Telescope - Webb Space Telescope Sites.
• X - Webb Space Telescope Sites.
• ESAWebb - Webb Space Telescope Sites.
• Webb Compare - Webb.
• APOD - Daily NASA Astronomy Images.
• r/SpacePorn - Astrophotography Subreddits.
• r/Astrophotography - Astrophotography Subreddits.
• Meteor Showers - 3D Meteor Shower Visualization.
• Live Meteors - Live Meteor Radio Echoes.
• Clear Dark Sky - Star Gazing Weather Forecasts.
• Dark Site Finder - Star Gazing Site Locators.
• DarkSkyMap - Star Gazing Site Locators.
• GoStarGazing - Star Gazing Site Locators.

Spacecraft

• EarthData - Daily Satellite Replays.
• Visible Earth - Satellite Imagery.
• Copernicus Browser - Satellite Imagery.
• SpaceFromSpace - Satellite Imagery.
• GOES-16 Satellite Imagery - Satellite Imagery.
• Sentinel Hub - Satellite Imagery.
• NASASpaceFlight - Launch Livestreams.
• Forum - Launch Livestreams.
• X - Launch Livestreams.
• Next Spaceflight - Rocket Launch & Spaceflight Schedules.
• X - Rocket Launch & Spaceflight Schedules.
• Space Notices - Rocket Launch & Spaceflight Schedules.
• nextrocket.space - Rocket Launch & Spaceflight Schedules.
• RocketLaunch - Rocket Launch & Spaceflight Schedules.
• Spaceflight Archive - Rocket Launch History.
• X - Rocket Launch History.
• TonyBela Infographics - Spacecraft.
• X - Spacecraft.
• HeroicRelics - Spacecraft Technical Information Archive.
• Ringwatchers - Starship Diagrams.
• X - Starship Diagrams.
• Energia-Buran Archive - Energia-Buran Image Archive.
• X - Energia-Buran Image Archive.
• Andegraf Rockets - Rocket Diagrams.
• Gunter's Space Page - Satellite Encyclopedia.
• X - Satellite Encyclopedia.
• Sven's Space Place - Space Mission Technical Analysis.
• Orbiter - Open Source Spaceflight Simulator.
• Sen - ISS Live Feed + Video Archive.
• X - ISS Live Feed + Video Archive.
• ISS In Realtime - Historical ISS Mission Replays.
• ISS Sim to SPACEX - ISS Docking Simulator.
• X - ISS Docking Simulator.
• Transit Finder - ISS Transit Tracking.
• ISS Tracker - ISS Transit Tracking.
• Spot The Station - ISS Transit Tracking.
• Where The ISS At? - ISS Transit Tracking.
• Satellite Map - Satellite Orbit Maps.
• KeepTrack - Satellite Orbit Maps.
• SGP4 - Satellite Orbit Maps.
• KeepTrackSpace - Satellite Orbit Maps.
• Track The Sky - Satellite Orbit Maps.
• Find Starlink - Satellite Orbit Maps.
• Space Atlas - Satellite Orbit Maps.
• X - Satellite Orbit Maps.
• azmth - Satellite Orbit Maps.
• Look4Sat - Satellite Orbit Maps.
• See A Satellite Tonight - Satellite Viewing Schedule.
• Spacebook - Evaluates.
• Leolabs Space - Low Earth Orbit Simulator.
• X - Low Earth Orbit Simulator.

Aerospace Engineering

• Awesome Aerospace Engineering - Aerospace Engineering Learning Resources.
• Awesome Flying FPV - Remote Copter.
• r/AerospaceEngineering - Aerospace Engineering Community.
• AerospaceWeb - Aerospace Info Database.
• JetPhotos - Aircraft Indexes.
• Forums - Aircraft Indexes.
• X - Aircraft Indexes.
• PlaneSpotters - Aircraft Indexes.
• Flight Mechanics - Aircraft Flight Mechanics Learning.
• eCalc - Aerospace Engineering Calculators.
• X - Aerospace Engineering Calculators.
• Av8n - Aviation Physics Textbook.
• SmartCockpit - Aircraft Systems.
• HeliStart - Helicopter Aerodynamics.
• V2Rocket - A-4 & V-2 Rocket History.
• Boeing 737 Technical Site - B737 Technical Engineering Guides.
• X - B737 Technical Engineering Guides.
• OpenVSP - Aircraft Geometry Tool.
• UIUC Applied Aerodynamics Group - Airfoil Coordinates.
• XFLR5 - Airfoils Analysis Tool.
• Outerzone - Model Airplane Plans.
• AeroFred - Model Airplane Plans.
• Airfoil Tools - Airfoil Coordinates.

Rocketry

• The Rocketry Forum - Rocketry Forums.
• Ye Olde Rocket Forum - Rocketry Forums.
• r/rocketry - Rocketry Community.
• Nakka Rocketry - Rocket Technical Archive.
• JCRocket - Rocketry Technical Information.
• Half Cat Rocketry - Liquid Rocket Guide.
• X - Liquid Rocket Guide.
• Roberts Rocket Project - LOX.
• OpenRocket - Rocket Simulator.
• Wiki - Rocket Simulator.
• RocketReviews - Rocket Reviews.
• ThrustCurve - Rocket Motor Performance Database.
• MIT Rocket Team - Official MIT Rocket Team Wiki.
• Jacobs Rocketry - Rocketry Info.
• Tripoli Rocketry - High-Powered Rocket Resources.
• NAR - High-Powered Rocket Resources.
• Facebook - High-Powered Rocket Resources.
• Hot Nozzle Society - High-Power Rocketry Guide.
• X - High-Power Rocketry Guide.
• RocketPy - High-Powered Rocket Simulator.
• openMotor - Internal Ballistics Simulator.

Drones

• UAVs FYI - Drone Information, Resources, Hardware & Supply Chain Analysis.
• X - Drone Information, Resources, Hardware & Supply Chain Analysis.
• OscarLiang.com - FPV Drone Tutorials.
• X - FPV Drone Tutorials.
• RCPlanes Online - RC Plane Aerodynamics.
• My Balsa & Glass Workshop - RC Model Builds.
• OpenDroneMap - Drone Mapping Software.
• Open Drone Logbook - FOSS Drone Log.
• X - FOSS Drone Log.
• Stolen Drone - Stolen Drone Info.

Simulators

• Falcon BMS - Falcon 4.0 Modernization Project.
• Wiki - Falcon 4.0 Modernization Project.
• Forum - Falcon 4.0 Modernization Project.
• FlightGear - Open-Source Flight Simulator.
• X - Open-Source Flight Simulator.
• GitLab - Open-Source Flight Simulator.
• Pheonix RC - RC Plane + Helicopter Simulator.
• SeligSIM - Flight Simulators for RC Planes.
• PicaSim - Flight Simulators for RC Planes.
• CKAN - Kerbal Space Program Mod.
• Luna Mulitplayer - Kerbal Space Program Multiplayer Mod.
• SatModeler - Satellite Mission Simulation Software.

History

• WW2 Links - Educational WW2 Resources.
• Historic Films - Historic Footage.
• National Film Preservation Foundation - Historic Footage.
• Histography - History Timelines.
• MorbidKuriosity - Dark History, Conspiracies, Crime, Myths, etc.
• LibreTexts History - History Learning Texts.
• Smithsonian Institution Archives - Historical Photos.
• RareHistoricalPhotos - Historical Photos.
• Museo - Museum Search.
• Arachne - Archaeology Object Database.
• Wonderous - Learn About Ancient Structures.
• Shorpy - Historical Photos.
• Historic Aerials - US Historical Aerial Imagery.
• EyewitnesstoHistory - Historical Eyewitness Testimonies.
• HMDB - Historical Marker Database.
• London Remembers - London Historical Marker Database.
• ManuscriptMiniatures - Medieval Manuscript Images.
• Emblematica Online - Renaissance Emblem Book & Image Archive.
• Ancient Graffiti - Early Roman Handwritten Inscriptions.
• BlackPast - African History Encyclopedia.
• Athena - Greek History Encyclopedia.
• Mission US - American History Learning Games.
• OnThisDay - What Happened on Specific Days.
• Royal Constellations - Royal Family Ancestral Visualization.
• Royal Armouries Collections - Ancient Armaments Museum.
• X - Ancient Armaments Museum.
• WildWinds - Ancient Numismatics.
• 911 Realtime - 9.
• TracesOfWar - Military History & Battlefield Landmark Archive.
• X - Military History & Battlefield Landmark Archive.
• The Dreadnought Project - Naval History Wiki (1880-1920).
• X - Naval History Wiki (1880-1920).
• Warbirds Resource Group - Military Aviation History Encyclopedia.
• Warbird Alley - Historical Archives of Military Aircraft.
• Forgotten Aviation - Historical Archives of Military Aircraft.
• Little Friends - WW2 8th Air Force History Archive.
• U-boat Archive - WW2 Battle of the Atlantic Historical Archive.
• X - WW2 Battle of the Atlantic Historical Archive.
• The Food Timeline - Food History Timeline.
• Historical Recipes - Historical Recipes.
• Tasting History - Historical Recipes.
• Gode Cookery - Authentic Medieval Recipes & Historical Info.
• The Food Historian - Food History Blog.
• SmartHistory - Art.
• gwulo - Historical Hong Kong Photo Archive.
• CARI - Design Aesthetics History.
• CARI Are.na - Design Aesthetics History.
• ChinesePosters - Chinese Propaganda Poster History.
• Fashion History Timeline - Historical Fashion Resources.
• Historical Fashion - Historical Fashion Resources.
• PessimistsArchive - Historical Technological Pessimism Archive.
• Time Portal - Historical Time-Period GeoGuessr.
• WenWare - Historical Time-Period GeoGuessr.
• TimeGuessr - Historical Time-Period GeoGuessr.
• Forebears - Name Etymologies.
• BehindTheName - Name Etymologies.

Tech History

• Historical Tech Tree - Historical Discovery.
• Calculating Empires - Historical Discovery.
• ETHW - Engineering and Technology History Wiki.
• Museum of Obsolete Media - Physical Media Format Wiki.
• BetaWiki - Operating System.
• Old Computer Museum - Computer History.
• The Retro Web - Computer Hardware History.
• GitLab - Computer Hardware History.
• HP Computer Museum - HP Computer History.
• The HP 9845 Project - HP Computer History.
• Folklore - Apple Computer History.
• X - Apple Computer History.
• TheAppleWiki - Apple Computer History.
• Crypto Museum - Cryptographic Machine History.
• VGA Museum - Graphic Cards History.
• Virus Encyclopedia - Computer Virus History.
• MobilePhoneMuseum - Mobile Phone History.
• WalkmanLand - Walkman History.
• Web Rewind - Interactive Web History Journey.
• InfoMesh - Web History.
• VersionMuseum - Website History.
• info.cern - First Website on the Internet.
• TubeVault - Archive of Oldest YouTube Users & Videos.
• rip.so - Dead Projects Archives.
• Killed By Google - Dead Projects Archives.
• Killed by Mozilla - Dead Projects Archives.
• Microsoft Graveyard - Dead Projects Archives.
• SuedByNintendo - Dead Projects Archives.
• NuclearWeaponArchive - Nuclear Weapons History.

Mythology / Folklore

• GodChecker - Religion.
• Theoi - Greek Mythology.
• ABookOfCreatures - Mythological Encyclopedias.
• Demons of the Deep - Mythological Encyclopedias.
• Bestiary - Mythological Encyclopedias.
• Germanic Mythology - Germanic Mythology.
• Inuit Myths - Inuit Mythology.
• ObscUrban Legend Wiki - Mythology.
• Encyclopedia Mythica - Mythology.
• FolkTexts - Mythology.
• Mythology.net - Mythology.
• Japanese Mythology - Japanese Mythology.
• Yokai - Japanese Mythology.

Humanities

World Data

• Awesome Datasets - Public Datasets.
• Worldometer - World Data & Statistics.
• TheScaleOfLife - World Data & Statistics.
• WorldBank - World Data & Statistics.
• US Census - World Data & Statistics.
• DataUSA - World Data & Statistics.
• Data.gov - World Data & Statistics.
• UN Data - World Data & Statistics.
• Our World in Data - World Problem Database.
• Data Commons - World Data Visualizations.
• Engaging Data - World Data Visualizations.
• EverySecond - Visualize Per Second World Data.
• If It Were My Home - Country Data Comparisons.
• GlobalEdge - Country Data Comparisons.
• MyLifeElsewhere - Country Data Comparisons.
• NationsEncyclopedia - Location.
• CityPopulation - Location.
• City Data - US City Data.
• Rulers.org - World Heads Of State & Government Databases.
• EveryPolitician - World Heads Of State & Government Databases.
• World Births and Deaths - World Birth.
• DataUNODC - Drug.
• Gun Violence Archive - Gun Violence Statistics.
• Incarceration in Real Numbers - Incarceration Visualization.
• Climate Data - Climate Change Data.
• Climate.us - Climate Change Data.
• Climate Explorer - Climate Change Data.
• En-ROADS - Climate Solutions Simulator.
• ExtremeWeatherWatch - Extreme Weather Data.
• Global Volcanism Program - Volcano Information Database.

Geography and Sociology

• Soar - Atlases.
• ArcGIS Living Atlas - Atlases.
• WorldAtlas - Atlases.
• Cool Maps - Atlases.
• Ekvis - Geography Quiz Sites.
• JetPunk Geography - Geography Quiz Sites.
• LizardPoint - Geography Quiz Sites.
• Seterra - Geography Quiz Sites.
• Teuteuf - Country Guessing Games.
• LibreTexts Social Science - Social Science Learning.
• Maps.com - Interesting.
• AntipodesMap - Find Antipodes.
• The True Size - Compare Country Size.
• MapFight - Compare Country Size.
• True Size of Countries - Compare Country Size.
• UNESCO World Heritage - World Heritage Location Index.
• Cultural Atlas - World Culture.
• GovTrack - US Government Legislation Tracking.
• iCivics - U.S. Law Learning Games.
• LGA World Database - LGBT Legal Rights Map.
• Trans Rights Map - Trans Legal Rights Map.
• 8000ers - Mountain Visualization & Info.
• WorldLicensePlates - World License Plate Index.
• Symbols - Symbol Database.

Vexillology / Flags

• Flags of the World - Flag Databases.
• Vexilo - Flag Databases.
• Flagid - Flag Databases.
• FlagLog - Flag Databases.
• Flaglookup - Flag Databases.
• FAME - Flag.
• r/vexillology - Vexillology.
• Flag Meanings - Vexillology.
• Flag Stories - Flag Design Breakdowns.
• PrideFlags - LGBT Flag Database.
• Flag Guesser - Flag Quizzes.
• Flagle - Flag Quizzes.
• Flagdle - Flag Quizzes.
• flagdoku - Flag Quizzes.
• Flag Match - Flag Quizzes.

Economics

• The Atlas of Economic Complexity - Global Economic Growth Data.
• Integrity Index - US Political Finance Integrity Database.
• CORE Econ - Economics Textbooks.
• OEC - Global Trade Data.
• UNCTAD - Global Trade Data.
• UN Comtrade - Global Trade Data.
• OEC Games - Trade Data Games.
• Statista - Market Statistics.
• BLS - U.S. Bureau of Labor Statistics.
• OpenSecrets - Government Money Tracking.
• WorldPoverty - World Poverty Data.
• Expatistan - Cost of Living Calculator.
• Cost of Living - Cost of Living Map.
• MoveMap - North America Property Costs Map.
• Opportunity Atlas - Interactive Future Success Impact Map.
• HungerMap - Global Hunger Map.
• Wealth, Shown to Scale - Wealth Inequality Visualization.
• Unequal Scenes - Scenes of Inequality Around the World.
• Dollar Street - Compare Homes by Country.
• Netblocks - Find Impact of Internet Shutdown on Economy.
• Is AI Profitable Yet? - Track Total Amount Spent.

Philosophy

• Stanford Encyclopedia of Philosophy - Philosophy Encyclopedias.
• IEP - Philosophy Encyclopedias.
• nLab Philosophy - Philosophy Encyclopedias.
• Search - Philosophy Encyclopedias.
• Early Modern Texts - Early Modern Philosophy.
• Philosophy Bro - Philosophy Resources.
• LibreTexts Philosophy - Philosophy Resources.
• Reasoned - Philosophy Resources.
• TheDailyIdea - Philosophy Resources.
• PhilosophyBasics - Philosophy Resources.
• Wireless Philosophy - Philosophy Videos.
• 1000-Word Philosophy - 1000-Word Essays on Philosophical Topics.
• Untools - Better Thinking Tools.
• Brainkit - Learn Helpful Principles.
• Art of Manliness - Develop Life Skills.
• Sketchplanations - Explanation Sketches.
• IEoP - Learn about Logical Fallacies.
• YouLogicalFallacyIs - Learn about Logical Fallacies.
• FallacyFiles - Learn about Logical Fallacies.
• LogicalFallacies - Learn about Logical Fallacies.
• RationalWiki - Pseudoscience Refutation Wiki.
• YourBias.is - Learn about Biases.
• The Cognitive Bias Codex - Interactive Cognitive Bias Infographic.
• Philosophy Stack Exchange - Philosophy Forum.
• Kialo - Debates.
• Effective Altruism Forum - Effective Altruism Learning.
• Forum - Effective Altruism Learning.
• Umsu - Analytic Tableaux Generator.
• Proofs - Natural Deduction Proof Checker.
• PropCalc - Propositional Logic Calculator.
• ModalLogic - Model Logic Playground.
• Logitext - Sequent Calculus Tutorial.
• WikEnigma - 'Known Unknowns' Wiki.
• The Trolley Problem Game - The Trolley Problem.
• Social Engineers - Social Engineering Guides.

Skills, Hobbies, and DIY

• Knots 3D - Learn to Tie Knots.
• Animated Knots - Learn to Tie Knots.
• NetKnots - Learn to Tie Knots.
• Ian's Shoelace Site - Learn to Tie Shoelaces.
• Make it Yourself - DIY Projects.
• Instructables - DIY Projects.
• CreativePark - DIY Projects.
• Low Tech Magazine - Sustainable DIY Tech Guides.
• Toys from Trash - Use Everyday Items to Make Toys.
• HamExam - Ham Radio Practice Exams.
• AA9PW - Ham Radio Practice Exams.
• HamStudy - Ham Radio Practice Exams.
• ARRL - Amateur Radio Resources.
• Exam Search - Amateur Radio Resources.
• Question Pools - Amateur Radio Resources.
• QRZ - Amateur Radio Call Sign Database.
• Forums - Amateur Radio Call Sign Database.
• Perry Morse - Learn.
• Morse Typing Trainer - Learn.
• ICWO - Learn.
• Lock Picking 101 - Lock Picking Forum.
• LibraryOfJuggling - Juggling Technique Database.
• diyhpluswiki - DIY Biohacking.
• Online Coin Club - Coin Collectors Database.
• ActivistHandbook - Campaigning.
• Privacy Guides Activism - Campaigning.
• Bridge Command - Bridge Command Ship Simulator.
• UER - Urban Exploration.
• MAP - Urban Exploration.
• PaperToys - Printable Paper Toys.
• Fold N Fly - Paper Airplane Guides.
• AXM Paper Space Scale Models - Spacecraft Paper Models.
• Erowid - Psychoactive Information.
• Shroomery - Psychoactive Information.
• PsychonautWiki - Psychonautics Wiki.

Music Learning

• Awesome Music Theory - Music Theory Resources.
• Muted - Music Theory.
• Open Music Theory - Music Theory.
• Chromatone - Music Theory.
• Teoria - Music Theory.
• SimplifyingTheory - Music Theory.
• LightNote - Music Theory.
• Music Theory - Music Theory.
• LibreTexts Music - Music Learning.
• Z-Tonnetz - Music Visualization Tool.
• Forum - Audio Courses.
• ProducerLibrary - Audio Production Tutorials.
• Helio - Music Composition Tools.
• NoteHeads - Music Composition Tools.
• MusicKit - Metronome, Tuner & Tone Generators.
• Tuner - Metronome, Tuner & Tone Generators.
• Tone Generator - Metronome, Tuner & Tone Generators.
• Tuner Ninja - Instrument Tuner.
• Circle of Fifths - Visualize Notes, Cords and Keys.
• ScoreCloud - Chord Detection.
• ChordReader2 - Chord Detection.
• Chordify - Chord Detection.
• Arpeggiator - Chord Progression Generators.
• Chordi - Chord Progression Generators.
• Chord Player - Chord Progression Generators.
• AutoChords - Chord Progression Generators.
• HookTheory - Chord Progression Library.
• LilyPond - Music Engraving Program.
• Piano Scribe - Piano Transcriber.
• Learning Music - Music-Making Lessons.
• Musicca - Music-Making Lessons.
• Midiano - Piano Practice.
• Piano Trainer - Piano Practice.
• ZaneH Piano Trainer - Piano Practice.
• Chord Nebula - Piano Practice.
• sightread - Piano Practice.
• Playsheet - Piano Practice.
• PianoCheetah - Piano Practice.
• Fundamentals of Piano Practice - Piano Practice Book.
• Keyboard Connect - Keyboard Tutoring App.
• TrueToneGuitar - Guitar Tools.
• Songsterr - Guitar Tools.
• FAChords - Guitar Tools.
• ChordBook - Guitar Tools.
• FretFlip - Learn Guitar Scales.
• Oolimo - Learn Guitar Scales.
• StringScales - Learn Guitar Scales.
• My Fretboard Trainer - Learn Guitar Scales.
• QFGM - Learn Guitar Scales.
• GuitarScale - Learn Guitar Scales.
• JamStart - Spotify Chord Charts.
• fretflip - Create.
• JustinGuitar - Guitar Lessons.
• Guitarsix - Guitar Lessons.
• Ultimate Guitar - Guitar Tabs.
• Chorder - Guitar Chord Finder.
• Guitar Fretboard - Virtual Fretboards.
• Fretastic - Virtual Fretboards.
• Gitori - Virtual Fretboards.
• coop3rdrumm3r - Drum Lessons.
• FreeDrumLessons - Drum Lessons.
• 911tabs - Tabs.
• Finger Tabs - Tabs.
• Jazz Improvisor - Improvised Jazz.
• LearningSynths - Synthesizers.
• Sight Singing Factory - Sight Singing Practice.
• PerfectPitch - Pitch Recognition Practice.
• MusicStaff - Music Teacher Search.
• ChiffAndFipple - Irish Traditional Music Forum.
• MIMO - Musical Instrument Database.
• VGM Sound Sources - VGM Sound Sources.

Art and Editing

• Creator Resources - Art & Animation Resource Index.
• AwesomeAnimeResearch - Anime Machine Learning.
• Drawabox - Drawing Lessons.
• Drawing Starter Pack Playlist - Drawing Lessons.
• Proko - Figure Drawing Lessons.
• PaintingTube - Art Video Tutorials.
• MarcoBucci - Art Video Tutorials.
• Alphonso Dunn - Art Video Tutorials.
• Feng Zhu FZD - Art Video Tutorials.
• Ctrl+Paint - Art Video Tutorials.
• Art Fundamentals - Art Video Tutorials.
• Circle Line Art - Art Video Tutorials.
• Ubu - Avant-Garde Artifacts.
• Online-Courses - Art.
• TutsPlus - Creative Courses.
• Curriculum for the Solo Artists - Self-Taught Artist Curriculum.
• DoArtDaily - Daily Art Challenges.
• Character Design References - Character Design Visual Library.
• FloobyNooby - Storyboard Guides.
• JMMStoryboardTips - Storyboard Guides.
• A Guide to Storyboards - Storyboard Guides.
• Settei Dreams - Anime Production Materials.
• McLelun - Anime Style Background Tutorial.
• AnimeOutline - Anime.
• PhotoshopTutorials.ws - Photoshop Tutorials.
• DomDesigns - Illustrator Tutorials.
• PhotoshopTraining - Photoshop YouTube Tutorials.
• Phlearn - Photoshop YouTube Tutorials.
• PiXimperfect - Photoshop YouTube Tutorials.
• Practice Drawing This - Drawing Practice.
• The Bezier Game - Pen Tool Practice.
• ArtWithFlo - Procreate Tutorials.
• Paintable - Digital Art Tutorials.
• Pedro's Pixel Art Tutorials - Pixel Art Tutorials.
• SLYNYRD - Pixel Art Tutorials.
• MetPublications - Art Learning Books.
• GraphicsCodex - 3D Computer Graphic Guides.
• DrawingNow - Learn to Draw.
• Drawing Tutorials - Learn to Draw.
• Drawingbooks.org - Old Drawing Books.
• Line of Action - Figure Sketch Tools.
• Timed Figure Poses - Figure Sketch Tools.
• LoveLifeDrawing - Figure Sketch Tools.
• Daily Life Drawing Sessions - Figure Sketch Tools.
• AnatomyArchive - Human Anatomy Drawing Tutorials.
• Artist Reference - Photo References for Artists.
• x6ud - Animal Photo Reference Search.
• Thomas Romain Perspective - Perspective Guide.
• Dimensions - Object Dimension Reference.
• Storied Colors - Historical Catalog of Colors.
• DevinKorwin Color Guide - Color in Paintings Guide.
• Draw Mix Paint - Learn Oil Painting.
• Ran Art Blog - Learn Oil Painting.
• Painting Demos - Painting Demonstrations.
• Seven Camels - Storyboarding Tips.
• Agora - Animation Learning Community.
• AMV101 - Animated Music Video-Making Guides.

Rubiks Cube

• Cubing.net - Cubing Tools.
• J Perm - Cubing Tutorials.
• CubeSkills - Cubing Tutorials.
• RubiksTrainer - Cubing Tutorials.
• Easiest Solve - Cubing Tutorials.
• CubeDesk - Feature-Rich Cubing Timers.
• csTimer - Feature-Rich Cubing Timers.
• SpeedCubeDB - Algorithm Database.
• F2L Trainer - F2L Rubiks Trainer.
• crystalcube - CFOP Cross Trainer.
• ZZ Method - Learn.
• Roux Trainers - Learn Roux Solving Method.
• SpeedSolving - Cubing Wiki.
• Wiki - Cubing Wiki.
• Ruwix - Cubing Wiki.
• World Cube Association - Cubing Competitions & Records.
• alg.cubing.net - Algorithm Animators.
• CubeDB - Algorithm Animators.
• Tao Yu Trainer - Algorithm Animators.
• F2L Trainer - Algorithm-Specific Trainers.
• BlindTrainer - Blindfolded Rubinks Trainer.
• Hypercubing - Hypercubing Wiki.
• Speedcube.app - Cubing Timer (Mobile-Friendly).
• SolveTheCube - Cubing Timer.
• qqTimer - Cubing Timer.

Chess

• Awesome Chess - Chess Resources.
• TheChessDirectory - Chess Resources.
• Chess Resources - Chess Resources.
• /m/Chess - Chess Subreddits.
• r/Chess - Chess Subreddits.
• r/Chess Books - Community Recommended Books.
• Lucas Chess - Chess Training Software.
• Chess Tempo - Tactics Training.
• Scid vs. PC - Chess Database Software.
• ChessGames - Chess Database.
• ChessLab - Learning Community.
• Listudy - Blindfolded Tactics.
• Chessable - Openings.
• TheChessWebsite - Learn.
• Chess OCR - Multi-Site Digital Chessboard Analysis.
• Shah Kur - Blindfolded Chess Practice.
• WintrChess - Engine Analysis.
• Chess Analysis - Engine Analysis.
• Pawn Appetit - Engine Analysis.
• Chesskit - Engine Analysis.
• YottaChess - Professional Player Database.
• Chessigma - Engine Analysis.
• En Croissant - Chess Analysis Tool.
• Chess Vision - Import Images Into Chess Engine.
• Tactic or Not - Evaluate Tactics.
• OpeningTree - Import Lichess and Chess.com Analysis.
• Chess Monitor - Aggregate Lichess and Chess.com Match History.
• 2700chess - Live Ratings for Super Grandmasters.
• 365Chess - Chess History.
• ChessVariants - Chess Variant Encyclopedia.
• Visual History of Chessmen - Chessmen History Guide.

Go / Baduk / Weiqi

• Go Magic: How to Play Go - Beginner Go Tutorial.
• r/baduk - Learning and reference resource.
• Online Go Server (OGS) - Learning and reference resource.
• Sensei's Library - Learning and reference resource.
• Sabaki - Learning and reference resource.
• Kaya - Go (Baduk.
• Black to Play - Go Puzzles.
• KataGo Training - Learning and reference resource.
• The Interactive Way To Go - Learning and reference resource.
• Josekipedia - Learning and reference resource.
• Waltheri's Go Pattern Search - Learning and reference resource.
• GoProblems - Learning and reference resource.
• GoKibitz - Learning and reference resource.
• Baduk.club - Map of Go clubs and Players.
• KGS Go Server - Learning and reference resource.
• Igowin - Learning and reference resource.

Dungeons & Dragons

• D&D Compendium - D&D Tools & Learning Resources.
• RPGBOT - D&D Tools & Learning Resources.
• 5etools - Rules & Content References.
• DM Screen - Rules & Content References.
• The Acaeum - Rules & Content References.
• D&D Beyond - Official Toolset for 5E.
• Kobold+ Fight Club - Encounter Builder & Balancer.
• Avrae - Learning and reference resource.
• DnD-Books - D&D 4E.
• D&D 5e BR - D&D 4E.
• Cruinne's D&D Reading Room - D&D Worldbuilding Checklist.
• DiceCloud - D&D 5e Character Manager.
• DMHeroes - D&D NPC Generator.
• Classic - D&D NPC Generator.
• Tetra-cube - Monster Statblock Generator.
• GM Binder - 5E Homebrew Document Editors.
• D&D Wiki - D&D Homebrew Wiki.

LEGO

• Awesome Lego - LEGO Resources.
• Rebrickable - LEGO Collection Manager.
• Mecabricks Workshop - Virtual LEGO Building.
• BrickLink Studio - Virtual LEGO Building.
• Brickset - LEGO Set Database.
• BrickEconomy - LEGO Set Database.
• Bricklink - LEGO Set Database.
• Brick Hound - LEGO Deal Alerts.
• Brickognize - LEGO Brick.
• MinifigScan - LEGO Minifigure Blind Box Identification Tool.

Language Learning

Multi-Language

• Language Links - Language Learning Resources.
• LibreTexts Languages - Language Learning Resources.
• /int/ Guide - Language Learning Resources.
• r/LanguageLearning Resources - Language Learning Resources.
• Speechling - Language Learning Tools.
• LexiLogos - Language Dictionary Indexes.
• Dictionary Index - Language Dictionary Indexes.
• Talking Dictionaries - Endangered Language Dictionary Index.
• Comprehensible Input Wiki - Learn Languages via Comprehensible Input.
• Language Transfer - Language Learning Lectures.
• Language Reactor - Learn Languages via Videos.
• Dreaming - Learn Languages via Videos.
• LLPlayer - Learn Languages via Videos.
• Trancy - Learn Languages via Videos.
• Easysubs - Learn Languages via Videos.
• Readlang - Learn a Language via Web Browsing.
• Omniglot - Writing System & Language Encyclopedia.
• Lute - Learn a Language via Reading.
• Chimahon - Learn Languages via Manga, Novels & Anime.
• Lingotype - Learn Languages via Typing.
• Language Learners - Language Learning Forum.
• WordReference - Translation Dictionary.
• Glosbe - Translation Dictionary.
• Reverso - Translation Dictionary.
• Yomitan - Popup Dictionary.
• ReverseDictionary - Search for Words Using Their Meanings.
• OneLook Reverse - Search for Words Using Their Meanings.
• Languagelearning.site - Language learning resource.
• Refold - Language Learning Roadmap.
• Lengualytics - Comprehensible Input Tracker.
• LingoDeer - Language Learning Lessons.
• Language Drops - Language Learning App with Thematic Vocab.
• OkyDoky - Language Learning App with Thematic Vocab.
• Yojik - Language Learning Courses.
• FSI Language Courses - Language Learning Courses.
• X - Language Learning Courses.
• DLIFLC - Language Learning Quizzes.
• Danobang - Language Learning Games.
• Ba Ba Dum - Language Learning Games.
• LanguageGuide - Visual Language Learning.
• clozemaster - Context-Based Language Learning.
• Sounter - Learn Languages via Music.
• LingoClip - Learn Languages via Music.
• LyricFluent - Learn Languages via Music.
• MORT - Learn Languages via Games.
• Textractor - Learn Languages via Games.
• Language Roadmap - Foreign Language Media Difficulty Guide.
• LearnWithOliver - Language Learning Flashcards.
• MyLanguages - Grammar.
• VocabTest - Grammar.
• My Little Word Land - Grammar.
• 50Languages - Grammar.
• Vocatra - Vocabulary Trainers.
• Conjuguemos - Vocabulary Trainers.
• QuizFlow - Vocabulary Trainers.
• Verbix - Verb Conjugator.
• ListLang - Most Used Words in Any Language.
• LingYourLanguage - Language Identification Test.
• Language Squad - Language Identification Test.
• IPA Reader - International Phonetic Alphabet Reader.
• Interactive IPA Chart - Learn Phonetic Alphabet Symbols.
• LocalLingual - Listen to Accents.
• DialectArchive - Listen to Accents.
• Plover - Stenography Engine.
• TeachMeHebrew - Learn Hebrew.
• wehewehe - Hawaiian Dictionary.
• Toku Reo - Maori Language Learning Show.
• Itchy Feet Comic - Asian Script Differentiation Guide.

Language Exchange

• The Language Exchange Network - Language Exchange Communities.
• InterPals - Language learning resource.
• Episoden - Language learning resource.
• Tandem - Language learning resource.
• Conversation Exchange - Language learning resource.
• RhinoSpike - Language learning resource.
• HiNative - Language learning resource.
• LangX - Language learning resource.
• Polyglot - Language learning resource.

English

• Many Things - ESL Resources.
• ESOL - English Learning Resources.
• youglish - YouTube Word Pronunciations.
• YouDict - YouTube Word Pronunciations.
• Forvo - Pronunciation Dictionary.
• HowJSay - Pronunciation Dictionary.
• The Internet TESL Journal - Resources for EFL and ESL Teachers.
• EFSET - English Proficiency Test.
• Spellcheck - English Spelling Game.
• Learn English Online - English Lessons.
• ESLFast - English Lessons.
• AntiMoon - English Lessons.
• Oxford Online - English Lessons.
• Learn English - English Lessons.
• Cambridge Online - English Lessons.
• EnglishCentral - English Video Lessons.
• BBC English - English Video Lessons.
• EngVid - English Video Lessons.
• Voscreen - English Video Lessons.
• Frenglish - English Learning Books.
• English E-Reader - English Learning Books.
• elllo - English Listening Lessons.
• Listening Lab - English Listening Lessons.
• TalkEnglish - Improve Spoken English.
• Stimuler IELTS Speaking Buddy - Improve Spoken English.
• WriteAndImprove - Improve English Writing.
• Elsaspeak - Practice English Conversations.
• IELTS69 - Cambridge English Practice Tests.
• IELTS Liz - IELTS Test Preparation.
• yell0wsuit - Word Learning Site.
• OxfordLearnersDictionaries - Word Learning Site.
• English Phrasal Verbs - English Phrasal Verb Practice.
• Podcasts in English - English Learning Podcasts.
• Langeek - Grammar.
• EnglishAccentMap - English Accent Videos.
• EnglishBanana - English Learning Worksheets.
• Free4Talk - English Learning Communities.

Japanese

• yame dame - Learning Resources.
• Tatsumoto - Learning Resources.
• GaijinRyman - Learning Resources.
• Nihongo - Learning Resources.
• Japanese Resources - Learning Resources.
• AnimeCards - Learning Resources.
• Japanese Pitch Accent Resources - Japanese Accent Resources.
• Manatan - Learn Japanese via Anime, Manga & Light Novels.
• JapaneseWithAnime - Learn Japanese via Anime, Manga & Light Novels.
• Immersion Kit - Learn Japanese via Anime, Manga & Light Novels.
• Nihongo con Teppei - Japanese Beginners Podcast.
• JapaneseTab - Japanese Learning Extension.
• Minato - Japanese Courses.
• Memento - Japanese Learning Video Player.
• Supernative - Learn Japanese via Media.
• LearnNatively - Learn Japanese via Media.
• jidoujisho - Learn Japanese via Books.
• Manabi - Learn Japanese via Books.
• VNClub - Learn Japanese via Visual Novels.
• Learn Japanese Grammar - Learn Japanese Grammar.
• BunPro - Learn Japanese Grammar.
• OJAD - Japanese Accent Dictionary.
• DelvinLanguage - Fill in Missing Japanese Words.
• Jlpt N3 - Jlpt Exam Questions.
• JapaneseTest4You - Jlpt Exam Questions.
• Grammar - Jlpt Exam Questions.
• GetKanda - Learn Kana.
• Nihonoari - Learn Kana.
• RealKana - Learn Kana.

Korean

• Read Korean Letters - Learn Korean Characters.
• KR Dict - Korean Learning Dictionary.
• HowToStudyKorean - Korean Lessons.
• iksi - Korean Classes.
• TalkToMeInKorean - Korean Learning Courses.
• Sogang - Korean Learning Lessons.
• 90 Day Korean - Korean Learning Lessons.
• Mirinae - Korean Word Breakdown.
• National Institute of Korean Language - Korean Dictionaries.
• LetsLearnHangul - Hangul Learning.
• Hangul Practice - Hangul Recognition Test.
• UltimateKorean - Korean Grammar.
• KoreanKeyboardLearner - Korean Typing Practice.
• Korean Trainer - Korean Numbers & Date Practice.
• Hangul - Korean Typing Practice.

Chinese

• YellowBridge - Chinese Learning Tools.
• DigMandarin - Chinese Learning Tools.
• Cantonese Sheik - Language learning resource.
• Refold Mandarin - Language learning resource.
• SinoSplice - Language learning resource.
• r/ChineseLanguage - Chinese Learning Community.
• Zhongwen - Learn via Classic Chinese Literature.
• Train Chinese - Chinese Learning App.
• ChineseSkill - Chinese Learning App.
• HelloChinese - Chinese Learning App.
• KongLongMandarin - Chinese Lessons.
• DU Chinese - Chinese Lessons.
• Dong Chinese - Chinese Lessons.
• Stroke Order - Chinese Writing Lessons.
• LexList - Chinese Writing Lessons.
• ArchChinese - Chinese Writing Lessons.
• Hanzi Grids - Chinese Writing Lessons.
• Chinese Character Database - Learn Chinese Characters.
• Dictionary Variants - Dictionary of Chinese Character Variants.
• HackingChinese - Chinese Learning Articles.
• Cantonese.ca - Chinese Vocabulary.
• CantoScrolls - Chinese Vocabulary.
• Laoshi - Chinese Vocabulary.
• Lindict - Chinese Dictionaries.
• CantoWords - Chinese Dictionaries.
• MDBG - Chinese Dictionaries.
• Revised Dictionary - Chinese Dictionaries.
• Concised Dictionary - Chinese Dictionaries.
• Mini Dictionary - Chinese Dictionaries.
• zdict - Chinese Dictionaries.
• Maorma - Chinese Tone Practice.
• The Chairman's Bao - Chinese Reading Practice.
• Pleco - Chinese Flashcards.
• Chinese Flashcards - Chinese Flashcards.

Cantonese

• Live Lingua Cantonese - Free Cantonese Courses.
• EdUHK - Cantonese Learning.
• OpenCantonese - Cantonese Learning.
• polyu - Cantonese Learning.
• eMiniMOOC2k - Cantonese Learning.
• Beginner's Cantonese - Cantonese Grammar Lesson.
• HKDict - Contemporary Cantonese-English Dictionary.
• OnlineCantonese - Cantonese Tone Practice.
• CanPro - Cantonese Pronunciation App.
• iOS - Cantonese Pronunciation App.
• Jyutping - Learn Cantonese Romanization System.
• LearnDuck - Learn Cantonese Romanization System.

European

• French Comprehensible Input - French Comprehensible Input Resources.
• Refold French - French Comprehensible Input Resources.
• StudySpanish - Learn Spanish.
• LibreLingo - Learn Spanish.
• SpanishDict - Spanish Translation Dictionaries.
• Linguee - Spanish Translation Dictionaries.
• SpanishChecker - Spanish Grammar Check.
• FluentWithStories - Learn Spanish via Stories.
• The French Tutorial - French Learning Tutorials.
• TV5MONDE - French Learning Videos.
• Uusi Kielemme - Finnish Learning.
• Finnish Flashcards - Finnish Flashcards.
• Resources - Finnish Flashcards.
• The People's Dictionary - Swedish Translation Dictionary.
• Easy Croatian - Croatian Language Learning.
• HR4EU - Croatian Language Learning.
• ancientgreek.jean.land - Ancient Greek Learning Site.

German

• German Learning Roadmap - German Language Resources.
• German Resources - German Language Resources.
• DW German Course - German Learning Course.
• VHS Lernportal - German Learning Course.
• Mobile - German Learning Course.
• Seedlang - German Learning App.
• Linguee - German Translation Dictionaries.
• Dict.cc - German Translation Dictionaries.
• VerbForm - Create German Verb Anki Flashcards.

South Asian

• Urdu Resources - Urdu Learning Resources.
• UrduNotes - Urdu Learning Resources.
• Mga Nagmamarunong's Masterlist - Tagalog Learning Resources.
• Learn Sanskrit - Sanskrit Lessons and Tools.
• Sanskrit Studio - Sanskrit Lessons and Tools.
• Urdupod101 - Urdu Grammar Overview.
• Video - Urdu Grammar Overview.
• Rekhta Dictionary - Urdu Dictionary.
• Sanskrit Subreddit - Sanskrit Resources.
• Resources - Sanskrit Resources.
• Ambuda - Sanskrit Dictionaries.

Sign Languages

• SpreadTheSign - Multi-Language Dictionaries.
• Sign Dictionary - Multi-Language Dictionaries.
• SL Dictionary - Multi-Language Dictionaries.
• ASL Dictionary - American Sign Language Dictionaries.
• Anysign - American Sign Language Dictionaries.
• WhatsThatSign - American Sign Language Dictionaries.
• StrongASL - American Sign Language Dictionaries.
• LifePrint - American Sign Language Dictionaries.
• ASLCore - American Sign Language Dictionaries.
• Sign Language 101 - American Sign Language Dictionaries.
• HandSpeak - American Sign Language Dictionaries.
• BSL Dictionary - British Sign Language Dictionaries.
• SignDeaf - British Sign Language Dictionaries.
• BSL Signbank - British Sign Language Dictionaries.
• MobileSign - British Sign Language Dictionaries.
• Signd - British Sign Language Dictionaries.
• Text to Sign - Convert Text to Fingerspelling in ASL or BSL.
• Rochester ASL / LSF - ASL.
• SignLex - Interactive Sign Dictionary.
• Helping Hands - VR-Based Sign Language Practice.
• Signbank - Australian Sign Language Dictionary.
• NZSL - New Zealand Sign Language Dictionary.
• SSC - BSL Academic Term Dictionary.
• BKS - British Key Word Signs.
• International Sign - International Sign Language.
• DeafTec - STEM Sign Dictionaries.
• Tachyo - STEM Sign Dictionaries.
• Interpreter Services - Specialized ASL Dictionary.
• ASL Learning - ASL Learning Sites.
• SignSchool - ASL Learning Sites.
• PocketSign - ASL Learning Sites.
• Sign AIP - Sign-Language Learning Videos.
• Fingerspell - ASL Fingerspelling Practice.
• SooSL - Create Custom Sign Language Dictionaries.
• ASL-LEX - ASL Visual Connections Map.
• Visualization - ASL Visual Connections Map.
• DeafVideo - ASL Vlogs + Videos.
• Learn NZSL - NZSL Learning Site.
• GSL - Ghanaian Sign Language Dictionary.
• HandyBSL - Learn.
• SignLearner - Learn ASL or BSL while Browsing Internet.
• Signs - ASL Learning AI.
• SignWriting - Sutton SignWriting System Learning + Resources.
• Learn BSL in SignWriting - Language learning resource.
• DPAN - Deaf Entertainment.
• Deaffest - Deaf Entertainment.
• DMDb - Deaf Entertainment.
• Lumo TV - Deaf Entertainment.
• DMDb - Deaf Movie Databases.
• Sign on Screen - Deaf Movie Databases.

Constructed Languages

• Links from Esperanto - Esperanto Learning Sites Index.
• pona.la - Toki Pona Learning.
• Lojban.io - Lojban Learning Resources.
• Esperanto12 - Esperanto Learning.
• Esperanto in 17 Minutes - Esperanto Learning.
• Toki Pona (.net) - Toki Pona Learning Sites.
• Toki Pona - Toki Pona Learning Sites.
• mun! - Toki Pona Learning Sites.
• lipu sona mi pi toki pona - Toki Pona Learning Sites.
• lipu sona pona - Toki Pona Learning Sites.
• Jan Lope Toki Pona - Toki Pona Learning Sites.
• DuoStories Toki - Toki Pona Learning Sites.
• Wasona - Toki Pona Learning Sites.
• sona pona - Toki Pona Wiki.
• Toki Pona Dictionary - Toki Pona Dictionaries.
• nimi.li - Toki Pona Dictionaries.
• Linku - Toki Pona Dictionaries.
• Audio - Toki Pona Dictionaries.
• Semantic Spaces Dictionary - Toki Pona Word Explanations.
• lipu tenpo - Toki Pona Magazine.
• Ithkuil by Example - Ithkuil Learning.
• Ithkuil - Ithkuil Learning.
• The Toaq Language - Toaq Learning Wiki.
• Eberban - Eberban Language Learning.
• Learn Eberban - Eberban Language Learning.
• Xextan - Xextan Language Learning.
• Wiki - Xextan Language Learning.
• Learn Na'vi - Navi (Avatar) Language Learning.
• Forum - Navi (Avatar) Language Learning.

Developer Learning

• Awesome Courses - Dev Course Indexes.
• Awesome Certificates - Dev Course Indexes.
• Awesome YouTubers - YouTube Dev Channels Indexes.
• r/LearnProgramming Wiki - Programming Learning Resources.
• Programming Learning Index - Programming Learning Resources.
• awesome-opensource-documents - Programming Learning Resources.
• A-to-Z-Resources-for-Students - Programming Learning Resources.
• Roadmap - Developer Roadmaps.
• Path to Senior Engineer - Software Engineer Resources.
• Professional Programming - Software Engineer Resources.
• freeCodeCamp - Programming.
• git-cheat-sheet - Git Command Lists.
• Git Commands - Git Command Lists.
• Git Cheatsheet - Git Command Lists.
• OpenVim - Interactive Vim Tutorials.
• StarSQL - SQL Lessons.
• SQL Practice - SQL Lessons.
• Learn SQL - SQL Lessons.
• First Timers Only - Contribution Guide for Beginners.
• Beej's Guide to Git - Git Guides.
• Git Tips - Git Guides.
• Oh My Git! - Git Learning Game.
• Oh Shit, Git!?! - Git Learning Game.
• Git Tutorial - Interactive Git Tutorial.
• Learn Git Branching - Interactive Git Branching Guide.
• Git Time - Git Learning Game.
• Hack Club - Non-Profit High School Coding Community.
• DevToolTips - Developer Tips.
• Checki0 - Code Learning Games.
• Scrimba - Interactive Programming Learning.
• CloudSkillsBoost - Programming Courses.
• MOOC.fi - Programming Courses.
• EggHead - Programming Courses.
• TechSchool - Programming Courses.
• Josh Comeau - Programming Tutorials.
• Scratch - Beginner Programming Learning.
• Firefox Extension - Beginner Programming Learning.
• Chrome Extension - Beginner Programming Learning.
• Package Projects - Beginner Programming Learning.
• Increase Speed - Beginner Programming Learning.
• Wiki / Guides - Beginner Programming Learning.
• MIT App Inventor - Beginner Programming Learning.
• USACO Guide - Competitive Programming Lessons.
• Beej's Guides - Programming Guides.
• LearnByExample - Programming Guides.
• CodinGame - Games to Practice Coding.
• Advent of Code - Programming Puzzles.
• Project Based Learning - Collection of Project-Based Tutorials.
• Interview University - Software Engineer Study Guides.
• System Design 101 - System Design Guides.
• system-design-primer - System Design Guides.
• CLIG - CLI Design Guide.
• LearnToCloud - Cloud Computing Guide.
• Server Survival - Tower Defense Game for learning Cloud Architecure.
• Swift Playgrounds - Learn Swift UI.
• Samples - Learn Swift UI.
• rTorr - Vim Editor Cheat Sheets.
• Vim University - Vim Tips.
• VimTip - Vim Editor Tips.
• Vim Adventures - Vim Learning Game.
• High Assurance Rust - Software Development Guide.
• LearningSEO.io - SEO Learning.
• SEO Cheat Sheet - SEO Learning.
• SQL PD - SQL Learning Games.
• SQL Noir - SQL Learning Games.
• Lost at SQL - SQL Learning Games.
• SQL Easy - SQL Learning Games.
• PostgreSQL Tutorial - PostgreSQL Tutorial.
• MySQL Tutorial - MySQL Tutorial.
• LearnOpenGL - Learn OpenGL.
• Devops Exercises - DevOps Exercises.
• 90DaysOfDevOps - Learn DevOps.
• Hasura - GraphQL Courses.
• systemd-by-example - Systemd Learning.
• The Linux Kernel - Linux Kernel Development Guides.
• Archives - Linux Kernel Development Guides.
• Workbench - Learn.
• botwiki - Learn How to Make Bots.

Coding Tutorials

• Build your own X - Advanced Coding Tutorials.
• Programiz - General Coding Tutorials.
• TutorialKart - General Coding Tutorials.
• Hackr.io - General Coding Tutorials.
• GeeksforGeeks - General Coding Tutorials.
• W3Schools - General Coding Tutorials.
• Tpoint Tech - General Coding Tutorials.
• Guru99 - Software.
• Codelabs - Project Based Tutorials.
• The SHA-256 Project - Learn to Develop SHA-256.
• calmcode - Video Tutorials.
• zetcode - Programming Notes.
• Ebook Foundation - Programming Ebooks.

Programming Languages

• 30 Days Of Python - Python Programming Challenge.
• Hitchhiker's Guide to Python - Python Guide.
• Typing.io - Programming Typing Practice.
• Silver Dev's WPM - Programming Typing Practice.
• A Byte of Python - Python Guide.
• Learn Python - Interactive Python Guide.
• FutureCoder - Interactive Python Guide.
• Genepy - Interactive Python Guide.
• Learn-Python - Python Playground.
• CS50 - Python Course.
• Tea Press - Python Learning Book.
• Learn C - C Tutorials.
• C++ Core Guidelines - C++ Tips.
• modern-cpp-tricks - C++ Tips.
• Learn C++ - C++ Lessons.
• StudyPlan - C++ Lessons.
• Makefile Tutorial - Makefile Tutorial.
• AmigosCode - Java.
• Java Design Patterns - Java.
• learncs.online - Java.
• Learn Next.js - Next.js Learning Resources.
• LearnGo - Learn Go Programming.
• Tour Go - Learn Go Programming.
• play-with-go - Learn Go Programming.
• Rust Learning - Rust Learning Resources.
• Poignant - Learn Ruby.
• Try Ruby - Learn Ruby.
• Learn Perl - Learn Perl.

Web Development

• MDN - Web Dev Learning Resources.
• Web Dev Resources - Web Dev Learning Resources.
• Odin Project - Programming.
• FullStackOpen - Full Stack Course.
• LandChad - Site Development Guides.
• 32bit - Site Development Guides.
• learn.sadgrl.online - Site Development Guides.
• Learn to Code HTML & CSS - HTML.
• PHP: The Right Way - Learn PHP.
• Learn PHP - Learn PHP.
• PHP Tutorial - Learn PHP.
• JavaScript.info - JavaScript Learning Sites.
• Patterns.dev - JavaScript Learning Sites.
• 30 Days Of JavaScript - JavaScript Learning Sites.
• Cloud Cost Handbook - Public Cloud Hosting Cost Guide.
• Web Dev for Beginners - Web Dev Course.
• Packet.School - Interactive Networking Learning.
• Awesome Network Analysis - Network Analysis Learning.
• Aquent Gymnasium - Web Dev Tutorials.
• CodeAnalogies - Web Dev Tutorials.
• Dash - Web Dev Courses.
• Web Skills - Web Dev Guides.
• Codeguage - Web Dev Guides.
• web.dev - Web Dev Guides.
• Encodedna - Web Dev Guides.
• Codevolution - Web Dev Video Lessons.
• The Copenhagen Book - Web App Auth Guidelines.
• DOM Events - Learn about DOM Events.
• WebRTCForTheCurious - WebRTC Guide.
• backendlore - Backend Coding Guides.
• Design Pattern for Humans - Backend Coding Guides.
• backend-challenges - Backend Challenges for Practice.
• Backend Cheats - Backend Cheatsheet.
• Full Stack Solana Development Guide - Examples.
• Examples - Examples.
• STPG - Startpage Creation Guides.
• Web Design in 4 Minutes - Interactive Web Design Tutorial.
• Strml - Interactive Web Design Tutorial.
• WebGL and GLSL Workshop - Interactive WebGL.
• HEAD - HTML head Element Guide.
• css-animation - CSS Animation Tutorial.
• 100DayCSS - CSS Challenges.
• CSS Challenges - CSS Challenges.
• PlayCSS - CSS Challenges.
• Codepip - CSS Learning Games.
• Grid Garden - CSS Learning Games.
• CSS Battle - CSS Learning Games.
• CSS Speedrun - CSS Learning Games.
• CodingFantasy - CSS Learning Games.
• CSS Diner - CSS Learning Games.
• Guess CSS - CSS Guessing Game.
• Flexbox Froggy - CSS Flexbox Learning Games.
• Flexbox Zombies - CSS Flexbox Learning Games.
• FlexboxDefense - CSS Flexbox Learning Games.
• KnightsoftheFlexboxTable - CSS Flexbox Learning Games.
• DefensiveCSS - CSS Tips.
• LearnCSSGrid - CSS Grid Guides.
• GridByExample - CSS Grid Guides.
• You Don't Know JS - JavaScript Learning Books.
• EloquentJavaScript - JavaScript Learning Books.
• JavaScript Questions - JavaScript Questions for Practice.
• JavaScriptQuiz - JavaScript Questions for Practice.
• 33 JS Concepts - Useful JavaScript Concepts.
• You-Dont-Need-jQuery - JavaScript Query Style Events Guide.
• Untrusted - JavaScript Learning Game.
• HTMLDog - HTML.
• Pixactly - Test Pixel Dimension Orientation.

Computer Science

• CompSciLib - Computer Science Tools.
• TeachYourselfComputerScience - Computer Science Book Recommendations.
• The Borr Project - Computer Science Roadmap.
• OSSU Comp Sci - Computer Science Roadmap.
• PT-BR - Computer Science Roadmap.
• CN - Computer Science Roadmap.
• CS50 - Harvard Computer Science Course.
• NandGame - Computer Building Puzzle.
• CraftingInterpreters - Scripting Language Implementation Book.
• CSRankings - Publication Activity of Computer Science Colleges per Topic.
• CS1000 - Computer Science.
• Tech Dev Guide - Computer Science Google Courses.
• Big-O Cheatsheet - Computer Science Complexities Cheatsheet.
• CSDIY - Computer Science Learning Guides.
• awesome-low-level-design - Computer Science Learning Guides.
• awesome-system-design-resources - Computer Science Learning Guides.
• LearnAIFromScratch - Computer Science Learning Guides.
• ProfessorMesser - IT Courses.
• Code.org - Computer Science Courses.
• cs-video-courses - Computer Science Courses.
• Modern Computer Science Curriculum - Computer Science Courses.
• SEE - Computer Science Courses.
• CollegeComendium - Computer Science Courses.
• Gwern.net - Gwern Branwen Essays (AI, Psychology, & Statistics).
• Runestone Interactive - Interactive Guides.
• Computerphile - Computer Science YouTube Channels.
• CSDojo - Computer Science YouTube Channels.
• ApressOpen - Computer Science Books.
• Papers We Love - Computer Science Research Papers.
• System Design Academy - Large Scale System Design Learning.
• CS Academy - Interactive Computer Science Lessons.
• From Nand To Tetris - Computer Building Lesson.
• Copetti - In-depth Console Architecture Analysis.
• Web Browser Engineering - Learn about Browser Engineering.
• OSDev Wiki - Operating System Dev Wiki.
• Wi is Fi - Wi-Fi Educational Guide.
• CPU Land - What Happens when you run Programs.
• Computer Science Lecture Links - Learning and reference resource.
• Eylenburg - Hardware.

Data Science

• Awesome DataScience - Data Science Resources.
• Awesome Data Analysis - Data Analysis Resources.
• Data Engineer Handbook - Data Engineer Resources.
• OSSU Data Science - Data Science Roadmap.
• Mage - Data Science Pipelines.
• Deepnote - Data Science Notebook.
• Visualization.info - Learn About Data Visualization.
• 365Datascience - Data Science Courses.
• Advanced R - R Guide.
• Solutions - R Guide.
• R Packages - R Packages Guide.
• R for Data Science - R Data Science Guide.
• Zero to Nix - Nix Learning Guide.
• ggplot2: Elegant Graphics for Data Analysis - Ggplot2 Guide.
• Data Science Ipython Notebooks - Learn DataScience.
• Scipy Lectures - Learn DataScience.
• Virgilio - Learn DataScience.
• Data Engineering Zoomcamp - Data Engineering Course.
• Data Engineering Practice Problems - Data Engineering Practice.
• Learn to Make Netflix Clone - Learning and reference resource.
• Zasper - Data Science IDE.

Data Structures

• Leetcode - Coding Practice.
• Solutions - Solutions, 2, 3, 4.
• 3 - Solutions, 2, 3, 4.
• 4 - Solutions, 2, 3, 4.
• Animations - Solutions, 2, 3, 4.
• Anki Cards - Solutions, 2, 3, 4.
• Videos - Solutions, 2, 3, 4.
• Resources - Solutions, 2, 3, 4.
• Analytics - Solutions, 2, 3, 4.
• NeetCode - Coding Interview Practice.
• algonds - Coding Practice.
• Codility - Coding Practice.
• ProjectLearn - Coding Practice.
• LintCode - Coding Practice.
• CodeWars - Coding Practice.
• Coding Questions - Coding Interview Questions.
• Skilled.dev - Coding Interview Questions.
• BuildBox - Hackathon.
• DevPost - Hackathon.
• HackTheEarth - Hackathon.
• EMKC - Hackathon.
• AtCoder - Hackathon.
• Toph.co - Hackathon.
• Rosetta Code - Coding Problems.
• CodeAbbey - Coding Problems.
• Kattis - Coding Problems.
• Coding Problems - Coding Problems.
• Exercism - Programming Lessons.
• HackerRank - Programming Lessons.
• CS Circles - Programming Lessons.
• Hello Algo - Data Structures and Algorithms Course.
• Algorithms Books - MIT Algorithm Focused Books.
• Algorithms-Cheatsheet-Resources - Code Algorithm Cheat Sheets.
• algorithms - Code Algorithms & Data Structures Tutorials.
• JavaScript Algorithms - Algorithms and Data Structures in JavaScript.
• VisuAlgo - Data Structure & Algorithm Visualizations.
• Data Structure Visualizations - Data Structure & Algorithm Visualizations.
• Algorithm Visualizer - Visualize Code Algorithms.
• Staying - Visualize Code Algorithms.
• Sorting Algorithms Visualizer - Visualize Code Algorithms.
• CSES Problemset - Collection of Algorithmic Programming Problems.
• Memery Spy - Learn how Bytes Represent Variables.

UI and UX

• design.tips - Design Tips.
• Utopia - Design Tips.
• HackDesign - UI.
• Sky Design - UI.
• Can't Unsee - UI Design Test.
• UXTools - Learn UX Design.
• UXMovement - Learn UX Design.
• SitePoint - UX Design Courses & Books.
• delightful humane design - Humane Design Resources.
• Laws of UX - Maxims.
• Deceptive Patterns - Deceptive User Experience Examples.
• UI Coach - UI Design Challenge Generator.
• FrontEndMentor - Frontend Design Challenges.
• Frontend Challenges - Frontend Design Challenges.
• Frontend Learning Kit - Frontend Learning Index.
• Frontend Bootcamp - Frontend Workshop.

Cybersecurity

• Free Cyber Resources - Cybersecurity Learning Resources.
• BlueTeam Tools - Cybersecurity Learning Resources.
• Applied Cybersecurity - Cybersecurity Learning Resources.
• Official Cybersecurity YouTube Channels - Learning and reference resource.
• CTF Sites - CTF Resources.
• echoCTF.RED - CTF Resources.
• CTF101 - CTF Resources.
• picoCTF - CTF Resources.
• CTF Beginners Guide - CTF Resources.
• CTFtime - CTF Resources.
• CTFLearn - CTF Resources.
• Awesome Sites to Test On - Cybersecurity Practice Sites.
• HackTricks - Practical Penetration Testing & Security Auditing Tips.
• PortSwigger Academy - Web Security Learning.
• OWASP Cheatsheet - Application Security Guide.
• Hackers101 - Cybersecurity Challenges.
• SmashTheStack - Cybersecurity Challenges.
• WebHacking - Cybersecurity Challenges.
• Skills for All - Cybersecurity Courses.
• 90DaysOfCyberSecurity - Cybersecurity Courses.
• TryHackMe - Cybersecurity Lessons.
• HackTheBox - Cybersecurity Lessons.
• OpenSecurityTraining2 - Cybersecurity Lessons.
• Addielamarr - Learn About Cybersecurity.
• Cyber Talent Kids - Learn About Cybersecurity.
• Teach Yourself Info Sec - Learn About Cybersecurity.
• pwn.college - Cybersecurity Practice.
• WeChall - Cybersecurity Practice Games + Rankings.
• OverTheWire - Cybersecurity Learning Game.
• Hacksplaining - Developer Security Lessons.
• x86re - Reverse Engineering Guides.
• Reverse-Engineering - Reverse Engineering Guides.
• Reverse Engineering Academy - Interactive Reverse Engineering Lessons.
• Nightmare - Binary Exploitation Defense.
• John Hammond - Cybersecurity YouTube Tutorials.
• Pentesting Bible - Learn Pentesting.
• Juice Shop - Learn Pentesting.
• How DNS Works - Learn DNS.
• How DNSSEC Works - Learn DNSSEC.
• CryptoPals - Cryptography Learning.
• Overview of Cryptography - Cryptography Learning.
• cryptohack - Cryptography Learning.
• CrypTool - Interactive Cryptology Learning.
• How HTTPS Works - Learn HTTPS.

Game Development

• Awesome-Gamedev - Learning Resources.
• Learn Gamedev - Learning Resources.
• MagicTools - Learning Resources.
• Newgrounds Wiki: Game Dev Resources - Learning Resources.
• The VG Resource - Learning Resources.
• Brackeys - Game Dev Tutorials.
• r/gamedev - Reddit Community.
• 20 Games Challenge - Beginner Game Dev Challenges.
• CodeWisp - Interactive Beginner Game Dev Learning.
• Amits Game Programming - Game Programming Guide.
• PICO-8 - Basic Game Dev Concepts.
• Web Version - Basic Game Dev Concepts.
• From Zero To Hero - 2D Game Dev Book.
• Web Game Dev - Game Dev Guides.
• SebastianLague - Game Dev Tutorials.
• Vulkan Guide - Vulkan Learnin Guide.
• Level Design Book - Level Design Guide.
• Trig for Games - Trigonometry Lessons for Games.
• Shadertoy - Real-Time Shader Dev Platform.
• Game Math - Mathematics Lessons for Game Devs.
• Graphics Workshop - Learn Computer Graphics.
• The Book of Shaders - Fragment Shaders Guide.
• EmuDev - Emulator Development Information.
• EmuDevs - NES Emulator Development Learning Game.
• QB64SourceCode - QB64 Game Programming Tutorials.
• 8bitWorkshop - Retro Game Programming Tutorials.

Exam Prep

• IBResources - International Baccalaureate Resources.
• FreeOnlineTest - Exam Practice Tests.
• Examveda - Exam Practice Tests.
• SaveMyExams - Exam Practice Tests.
• Aglasem - Exam Practice Tests.
• MajorTests - Exam Practice Tests.
• Alloprof - Exam Practice Tests.
• IndiaBIX - Aptitude Tests.
• Science Career General - PhD.
• DoubtNut - Exam.
• Papers.Xtreme - Test Revision Notes & Answers.
• Mojza - Exam Study Notes.
• Get Sum Math - GED Prep.
• r/APStudents Course Survey - AP Exam Comparison Spreadsheet.
• r/CATpreparation - CAT Test Prep.
• Revisely - GCSE Exam Help.
• free-clep-prep - Free CLEP.
• ModernStates - Free CLEP.
• NCERT Books - NCERT Practice Books.
• nzqa.toasting - Download NZQA Past Papers.
• CatchaScience - IGCSE Study Notes.
• IGCSEResources - IGCSE Study Notes.
• r/IGCSE - IGCSE Study Notes.
• ZNotes - IGCSE Study Notes.
• IGCSE Papers - Download Past GCSE.
• exam-mate - Download Past GCSE.
• Study Hatch - Download Past GCSE.
• RevisionScience - Download Past GCSE.
• Physics & Maths Tutor - Download Past GCSE.
• ISC.exe - Indian School Certificate Examinations (ISC) Resources.
• GaryChamberlainLectureNotes - Econometrics Lecture Notes.

SAT Testing

• Digital SAT Resources - SAT Resources.
• SAT Slayer - SAT Practice Exams.
• Mcelroy Tutoring - SAT Practice Exams.
• OnePrep - SAT Practice Exams.
• Sat DB - SAT Practice Exams.
• The SAT: Practice Tests - SAT Practice Exams.
• SAT Question Bank - SAT Practice Exams.

JEE / NEET

• r/JEENEETards Index - Guides.
• PhysicsWallah - JEE Lessons.
• ExamSide - PYQ Solutions.
• Practice Environment - PYQ Solutions.
• JEE Hub - JEE.
• Genetry - JEE Lectures.
• YouTube Lengths - Lecture Lengths.
• Fastlane Lengths - Lecture Lengths.
• Normal Lane Lengths - Lecture Lengths.
• MarksAPP - Guides.

Educational Tools

• nanoHUB - Nanotechnology Tools.
• Excalidraw - Whiteboards.
• Sharing - Whiteboards.
• OpenBoard - Whiteboards.
• tldraw - Whiteboards.
• DGM - Whiteboards.
• NotebookCast - Whiteboards.
• WebWhiteboard - Whiteboards.
• Microsoft Whiteboard - Whiteboards.
• WBO - Whiteboards.
• OurBoard - Whiteboards.
• Whiteboard.fi - Whiteboards.
• Whiteboard Fox - Whiteboards.
• FreeForStudent - Free Student Deals.
• Student Offers - Free Student Deals.
• Better Canvas - Canvas Enhancement Extension.
• ImageJ - Scientific Image Analyzers.
• Web - Scientific Image Analyzers.
• Fiji - Scientific Image Analyzers.
• Altium - Schematics Visualizer.
• Wolfram Cloud - Computational Intelligence.
• BachelorStudies - Bachelor Degree Search.
• Scholarship Roar - Scholarship Database.
• Extracurriculars.org - Extracurricular Search.
• snow.day - Extracurricular Search.
• Talem - Extracurricular Search.
• Niche - University.
• TheUniGuide - University.
• Alumnius - University.
• Top Universities - University.
• RateMyDorm - College Dorm Reviews.
• 😃 - College Dorm Reviews.
• RateMyProfessor - Professor Ratings.
• Wordwall - Lesson Creator.
• The Chomsky Index - Noam Chomsky Content Index Tool.
• Internet-In-A-Box - Create Free Offline Learning Hotspots.

Study and Research

• Awesome Research - Research Tool Indexes.
• Scolary - Research Tool Indexes.
• KausalFlow - Research Tool Indexes.
• StudyLion - Study Tracker.
• StudyKit - Quizzes.
• Knowt - Quizzes.
• Quizlet - Quizzes.
• Shmoop - Quizzes.
• Bitesize - Quizzes.
• SparkNotes - Quizzes.
• OpenSyllabus - Syllabus Search.
• Refseek - Academic Search Engines.
• Explorer - Academic Search Engines.
• Merlot - Academic Search Engines.
• Coursicle - Class Schedule Tracker.
• Helium - Class Schedule Tracker.
• Driftly - Class Attendance Tracker.
• SciSpace - Research Chatbots.
• Bohrium - Research Chatbots.
• Scinito - Research Chatbots.
• Elicit - Research Chatbots.
• StudyKit - Online Study Tools.
• Paper Trails - Academic Article.
• ResearchRabbit - Academic Article.
• Co-STORM - Generate Scientific Articles.
• SciArena - Generate Scientific Articles.
• mybib - Citation Generators.
• citemaker - Citation Generators.
• formatically - Citation Generators.
• zbib - Citation Generators.
• CitationMachine - Citation Generators.
• BibGuru - Citation Generators.
• Scribbr - Citation Generators.
• CiteFast - Citation Generators.
• Cite This For Me - Citation Generators.
• Chrome - Citation Generators.
• Publish or Perish - Citation Analyzer.
• Inciteful - Find Connected Literature via Citations.
• PLText - Plagiarism Checkers.
• PlagiarismDetector - Plagiarism Checkers.
• Duplichecker - Plagiarism Checkers.
• cb2bib - Reference Extractors.
• MassiveMark - Convert LLM Chats to DOCX.
• GROBID - Extract.
• ExpertFile - Industry.
• ExpertiseFinder - Industry.
• Foam - Knowledge Management System.
• Zotero - Research Assistant.
• Catma - Research Markup & Analysis Tool.
• Scrible - Research.
• OpenRefine - Data Cleaning.
• Taguette - Data Analysis Document Tagging.
• Lurnby - Research Highlighting Tool.
• General Index - Article Metadata Mining Project.
• Papertag - Attach Digital Content to Paper.
• Graded - Grades Tracker.
• GradesCalculator - Calculate CGPA & GPA.
• CalculateCGPA - Calculate GPA.
• LearnedEasy - Create Summaries.
• Brainly - Homework Help Bots.
• MammothMemory - Visual Memory-Based Solutions.
• Modern Classroom - Improved Google Classroom Extension.
• StudyStream - Online Study Groups.
• Yeolpumta - Online Study Groups.
• StudyTogether - Online Study Groups.
• Space Finder - UK Study Space Search.
• Cheatography - Educational Cheat Sheets.

Flashcards

• Anki - Flashcard App.
• Add-ons - Add-ons.
• Decks - Add-ons.
• Resources - Add-ons.
• Anki Android - Anki Mobile Apps.
• AnkiWeb (iOS) - Anki Mobile Apps.
• StudyCraft - Flashcard App.
• StudyLib - Online Flashcards.
• Flippity - Online Flashcards.
• revisiondojo - Online Flashcards.
• Flashka - Online Flashcards.
• NoteKnight - Online Flashcards.
• RemNote - Flashcard App.
• Flashcard Machine - Flashcard App.
• Gizmo - Flashcard App.
• SearchifyX - Search Flashcards.

Calculators

• WolframAlpha - Calculators.
• Omni Calculator - Calculators.
• OpenCalc - Android Calculators.
• yetCalc - Android Calculators.
• microMathematics - Android Calculators.
• GeoGebra - Graphing Calculators.
• Desmos - Graphing Calculators.
• CEmu - TI-84 Calculators.
• TI 84 Calculator - TI-84 Calculators.
• 3 - TI-84 Calculators.
• 4 - TI-84 Calculators.
• 5 - TI-84 Calculators.
• 6 - TI-84 Calculators.
• 7 - TI-84 Calculators.
• numbr.dev - Calculators.
• Aqua Calc - Calculators.
• PlanetCalc - Calculators.
• vCalc - Calculators.
• MatrixCalc - Matrix Calculator.
• Qalculate - Desktop Calculator.
• QwikTape - Note Style Calculator.
• Kalker - Scientific Calculators.
• SpeedCrunch - Scientific Calculators.
• Numbat - Scientific Calculators.
• TICalc - TI Graphing Calculator Files.
• arTIfiCE - TI CE Calculator Jailbreak.
• Numla - Live Calculative Notepads.
• Math Notepad - Live Calculative Notepads.
• Mathway - Math.
• MathDF - Math.
• Tiger Algebra - Math.
• Maxima - Math.
• Symbolab - Math.

Dictionaries and Thesaurus

• OneLook - Multi-Source Dictionary.
• Wiktionary - Multi-Language Dictionary.
• Merriam-Webster - Dictionary.
• GoldenDict - Dictionary.
• NGrams - Word Usage Trackers.
• Netspeak - Word Usage Trackers.
• UrbanDictionary - Slang Word.
• Slangit - Slang Word.
• Wordnik - Dictionary.
• Oxford English Dictionary - Dictionary.
• Cambridge Dictionary - Dictionary.
• Ozdic - Multi-Dictionary.
• PowerThesaurus - Thesaurus.
• Moby Thesaurus - Thesaurus.
• Historical Thesaurus of English - Historical Thesaurus.
• Phrases.org - Phrase Dictionary.
• Time Traveler - Find Words First Printed Usage.
• EtymOnline - Etymologies.
• StarlingDB - Advanced Linguistics Dictionary.
• Phrontistery - Obscure Word Dictionary.
• Unionpedia - Word Connections.
• Lexipedia - Word Connections.
• VisuWords - Word Connections.
• Eunoia - Words with No Translation.
• Affixes.org - Affixes.
• Fraze.it - Sentence Search.
• Feeels - Emotion Synonym Chart.
• TheDevilsDictionary - Cynical Dictionary.
• WordSafety - Swear Word Indexes.
• PyGlossary - Convert Dictionary Files.
• DSL Converter - Convert Dictionary Files.

Encyclopedias

• List of Encyclopedias - Online Encyclopedia Index.
• Wikipedia - Encyclopedia.
• Content List - Encyclopedia.
• EncycloSearch - Encyclopedia Search Engines.
• Omniglot - Writing Systems & Languages Encyclopedia.
• Simple Wiki - Simplified Wikipedia.
• namuwiki - Korean Encyclopedia.
• Britannica - Learning and reference resource.
• EverybodyWiki - Learning and reference resource.
• Encyclopedia - Learning and reference resource.
• NewWorldEncyclopedia - Learning and reference resource.
• Citizendium - Learning and reference resource.
• Wikitia - Learning and reference resource.
• InfoPlease - Learning and reference resource.
• Refdesk - Learning and reference resource.
• HandWiki - Learning and reference resource.

Wikipedia Tools

• HatNote - Top Pages.
• Reversepedia - Page Connections Search.
• Wikigraph - Page Connections Visualizer.
• wik - Wiki TUI.
• CDPedia - Offline View.
• WikiBoard - Pin Board Style Browser.
• The Museum of All Things - 3D Virtual Wikipedia Museum.
• Substance - Extract Markdown.
• UrlShortener - Shorten URLs.
• WikiNearby - Location Search.
• EntiTree - WikiData Visualization Tool.
• Wiki Timeline - Create Timelines from Wiki Articles.