Education & Reference
Total Bookmarks: 1317
- Academia Lab
- DosisPedia
- EON Reality — Leading XR and AI Solutions for Education & Industry
- Memodi
Calculator
- ⭐ SubnetMonkey — IPv4 Subnet Calculator
- AI Electricity & Water Use Cost Calculator — BEUK
- CalculateYogi — Free Online Calculators for Everything
- Calculator Soup — Online Calculators
- RapidTables
Fractal Graphing Calc
Gematria
- Gematria Calculator
- Gematria Calculator
- Gematrinator — Gematria Calculator
- Gematrinator.com
- Gematrix.org
- Hebrew Gematria Calculator
Math Calculator
- ⭐ Geogebra /
— free math tools - ⭐ KDE Cantor
- ⭐ Wolfram|Alpha
- Calc Business 4.4.2
- Calculadoras Online
- calcular.IO — Calculadoras online
- Calculator-1
- Calculator.net
- calculatoratoz
- Calculatored
- Calculators.org
- CheckYourMath
- Cymath
- Darkempire78/OpenCalc · GitHub
- DataMelt
- Derivative Calculator
- Desmos
- dlippman.imathas.com
- fxSolver
- Graspable Math
- Integral Calculator
- Jumk.de Webprojects
- Kalker — a modern calculator
- LogarithmPlotter
- Mathstools
- MathStudio
- Mathway
- MathWorks — Makers of MATLAB and Simulink
- Matrix calculator
- Matrix Multiplication
- Microsoft Math Solver
- Microsoft Math Solver — Math Problem Solver & Calculator
- Modulo Calculator
- NumPy /
- Nutpan Terminal Calculator
- Omni Calculator
- Online Calculator
- Online Number Tools
- OriginLab
- PaddiM8/kalker · GitHub
- Photomath
- Qalculate! /
- RKWard
- SageMath
- Scilab
- SpeedCrunch — BitBucket
- Stemkoski’s github
- Symbolab
- ziadOUA/zCalc · GitHub
Math Graphing Calculator
- 3D Surface Plotter
- Anvaka / — Visualization of exponential sums
- CalcPlot3D
- CPM 3D Plotter
- Desmos Calculator
- Dippman iMaths
- FooPlot — Gráficas en 2D
- GeoGebra 3D
- Graficador de funciones 3D
- graph.tk
- Graphing Calculator — Reshish
- GraphSketch
- MAFA Function Plotter
- Math3d
- Mathbox Demos — Github
- Mathpix • 3D Grapher
- Meta-calculator
- PhiloGL — Surface Explorer
- Solumath Graphing Calculator
- Surface Point Clouds
- Zweigmedia — Surface grapher
Physics Calculator
- ⭐ Advanced Earth Curvature Calculator — Walter Blisnis
- ⭐ Flat Earth Dome Model — Walter Blisnis
- Atmospheric refraction calculator — IAC
- Calculate Angular Diameter
- Calculators, Equations and other Stuff — WaBis
- Earth Curvature Calculator
- Earth Curvature Calculator — Omnicalculator
- Earth Curve Calculator
- Firmamenttrackers
- Flataverse
- Fresnel Zone Calculator
- Generate a panorama
- Horizons System — NASA
- Rechneronline — Useful Calculators
- Shane’s Personal Celestial Sphere Model
- Walter Bislin Model
- WikiTerra · jsgraph
Sleep Cycle Calculator
- ⭐ Sleepytime — bedtime calculator
- rico-vz/SleepSageCLI — Optimal sleep calculator directly from your terminal ✨
- Sleep Calculator
- Sleep Calculator — Ideal Bedtime & Wake Up Times - Sleepytime
- Wake Up Time — Sleep and Wake Up Calculator
Units Converter
- AdvancedConverter
- Calculadora de horas
- Calculadoras.uno
- CalculateMe
- Calculator.name
- Convert Units
- Currency Converter
- Currency World
- Data Units Conversion
- DateTime.io
- Exchange-rate
- Numbers Conversion Table — UnitConversion.org
- Unit Converter
- Unit Converter
- UnitConversion.org
- Unitpedia
- Unix Time Stamp — Epoch Converter
Flashcard Learning Tool
- Anki — powerful, intelligent flashcards
- ankidroid/Anki-Android · GitHub
- david-swift/Memorize — Study flashcards in a native GNOME app
- Dekki
- Mochi — Spaced repetition made easy
- Quizfreely / — Free & Open Source Studying Tool
- Studying — done the correct way
- studylib.net — Essays, homework help, flashcards, research papers, book reports, and others
- wbernard/Memorado — Memorize anything
Human Test
- 123test
- A Real Me
- Color Blind Test
- Daypo — Tests Online
- Hacertest.com
- Portal del Permiso de Armas — Test Teórico y Recursos de Preparación 2025
- Quizack — Skill Assessment (Online Tests)
- Test de orientación vocacional
- Test Inteligencias Múltiples
- Test-Guide
- Wheel of life — Online test
- Wheel of Life — Take the Assessment
Reaction Test
Test IQ
Language Tools
Dictionary
- American Sign Language ASL Dictionary
- Archive / gnome-dictionary · GitLab
- Artha ~ The Open Thesaurus
- cli-dictionary/cli-dictionary · GitHub
- Crissium/SilverDict · GitHub
- Diccionario Chemnitz
- DICT Development Group
- Dictionaries for Mac
- Dictionary API
- Dictionary WordMagic
- Dictionnaire de l’Académie française
- Dictionnaire Littré — Dictionnaire de la langue française
- Éditions Le Robert — la référence en langues pour définir, traduire,
- Free Dictionary project
- Freelang
- freespanish/Diccionario RAE
- Gaffiot
- Glosarium
- GoldenDict — SourceForge
- goldendict/goldendict · GitHub
- Iciba
- ikey4u/wikit — Wikit - A universal lookup tool
- johnfactotum/quick-lookup · GitHub
- Larousse.fr
- Lexilogos
- Libellus
- Lisan ul Arab (لسان العرب) — Free Download, Borrow, and Streaming : Internet Archive
- LSJ — GreekEnglishLexicon
- mufeedali/Wordbook — Wordbook is a dictionary application built for GNOME
- NAVER Dictionary
- OpenDict
- Pagina d’entrata — Accademia della Crusca
- pot-app/pot-desktop · GitHub
- Pressmon
- Samanya Angreji Hindi Shabdkosh — Singh, Rammurti : Free Download, Borrow, and Streaming : Internet Archive
- SpreadTheSign — Sign language dictionary
- StarDict — The best dictionary program in linux and windows
- sugarlabs/words-activity — A multilingual dictionary activity for the Sugar environment
- Tagaini Jisho
- Wörterbuch der deutschen Sprache ✒️ Duden Online
- yomitan / — Pop-up dictionary browser extension for language learning
Dictionary of Chinese
- Baike.com
- Chinese Dictionary
- Dictionary Youdao
- LINE Chinese-English Dictionary
- MDBG Chinese Dictionary
- Zhongwen — Chinese-English Dictionary - Chrome Web Store
- 漢語大詞典 — Chinese Dictionary Compendium 漢語辭典總匯
- 词典|汉语词典|现代汉语词典|在线词典-汉语言文学网
Dictionary of English
- Artha
- Bab.la
- Cambridge Dictionary
- Collins Dictionary
- Diclib
- dict.org
- Dictionary by Merriam-Webster
- Dictionary.com
- Dictionary.net
- Educalingo dictionary
- English-Corpora
- enwiktionary (latest) — Wikimedia dumps
- Find Words
- FOLDOC — Computing Dictionary
- Freak Thesaurus
- Free Dictionary
- Freelang Dictionary
- OneLook Dictionary
- Online Etymology Dictionary
- Open English WordNet /
- Oxford English Dictionary
- Oxford Learner’s Dictionaries
- Princeton WordNet
- Reverse Dictionary
- Sideways Dictionary
- Slangit
- The Free Dictionary
- The Skeptic’s Dictionary
- TheSage English Dictionary and Thesaurus
- Urban Dictionary
- WikiDiff
- Wiktionary Enlgish — Wikimedia
- Wiktionary, the free dictionary
- WordWeb
- WordWeb — English dictionary
- YourDictionary
Dictionary of Spanish
- ¿Qué significa?
- A — Real Academia de la Lengua
- DECEL — Diccionario Etimológico Castellano en Línea
- Diccionario básico de canarismos — Academia Canaria de la Lengua
- Diccionario Canario o Habla Canaria — Un fisquito de Canario, por favor …
- Diccionario de la lengua española
- Diccionario de uso del español — María Moliner | VK
- Diccionario del español actual de Manuel Seco — nueva edición digital
- Diccionario del español de México
- Diccionario Enciclopédico Español
- Diccionario histórico de la lengua española
- Diccionario RAE — Apps on Google Play
- diccionario-lengua — codeberg
- Diccionarios.com
- Dirae
- Frases y Citas en Latín — dechile.net
- Palabras que
- RAE API — Diccionario RAE
- SignificadoDe
- SM Diccionarios
- Wiktionary es — Wikimedia
How to Pronounce
- Forvo
- How To Pronounce
- Howjsay — Pronunciation
- toPhonetics
Semantic & Thesaurus
- ⭐ BabelNet — The largest multilingual encyclopedic dictionary and semantic network
- ⭐ ConceptNet — Multilingual graph
- Abbreviations
- Abbreviations and acronyms dictionary
- All Acronyms
- Branah — Type in your language
- Chinese Open Wordnet (cow)
- English Grammar Online — EGO
- FrameNet — Berkeley
- Global WordNet Association
- Lenguaje español
- Lexico.com
- Lexipedia
- Macroscope — Analysis of languages
- Moby Thesaurus
- own-pt/openWordnet-PT — OpenWordnet-PT: an open access wordnet for Portuguese
- Pealim — Hebrew
- Power Thesaurus
- Refine
- Relatedwords
- RhymeZone
- Salah-Sal/arabic-wordnet-v4 — Arabic WordNet 4.0 · GitHub
- Sinónimo.es
- Sinónimos Online
- Synoniemen.net
- Synonym
- Thesaurus
- Thesaurus.plus
- Verbix verb conjugator
- Vocabulary.com
- WordHippo
- Wordnet List — Cygnet — A Network of Signs
- WordType.org
Words
Languages
- 8Belts
- Chino Simplificado
- Eingleses
- Ethnologue — Languages of the World
- Gate2HOme — Virtual keyboard
- Glottolog
- Greek Language
- Hebrew Today
- I Will Teach You A Language
- IPA
- LangFocus!
- Language Transfer
- Learn a Language
- Learn French
- Lexi Explorer
- Loecsen / Online languages
- My Languages
- PushkinOnline — Learn russian
- Read Korean letters
- Ricotta
- YellowBridge Chinese
English Language
English Exam
- Cambridge English
- Cambrigemb
- ETS
- Oxford English Testing
- Oxford University Press — ELT Test English
- Pearson VUE
English Online
- Amigos Ingleses
- Aprende inglés
- BBC Learning English
- British Council — Learnenglishteens
- Cambly
- Curso de inglés
- Emery.world — The best English courses online
- English Practive
- English with Lucy
- EnglishClass101
- FluentU
- italki
- La Mansion del Ingles
- Learn English
- Learn English Free
- Learning English with Oxford
- Perfect English Grammar
- USA Learns
- VOA learn English
- Write & Improve
English Test
- Altissia
- Cambridge Speak & Improve
- Cambridge Test English
- EF SET® English test
- English Tests — Test your English
- esl-lounge Student
- Free English Level Test
- Free English Tests
- ILS English
- Online English level test
- Oxford Test of English
- Oxford Test of English old
- Prueba de Nivel de Inglés
- Test de Inglés — Vaughan
- Test English
- Test english
Languages App
- Andy English Bot
- Babbel
- BoldVoice
- Busuu
- Compromise
- Duolingo — The world’s best way to learn a language
- ELSASPEAK
- Fluent — Learn a New Language
- German Nouns — German Genders app
- Glossarie — The new, immersive way to learn a language
- Gymglish — Cours de langues en ligne
- HelloChinese — #1 app for learning Chinese!
- HelloTalk — Language Exchange - Learn Languages for Free
- HiNative
- HiNative
- iKnow!
- LanguageDrops
- Learn Chinese Characters
- LingoChamp
- Lingotype — Learn Languages by Typing Real Conversations
- LingQ
- Lingualeo
- LinguaLift
- Lingvist
- Lupa.app
- LuteOrg/lute-v3 — LUTE = Learning Using Texts: learn languages through reading
- Memrise
- Migaku.io
- Mondly
- MosaLingua
- Noun Town Language Learning
- pimsleur — Learn New Languages Online: Effective Programs for Beginners
- Pleco
- Polly Lingual
- Preply — Learn with the best online language tutors on app & web
- Quilingo — Language learning with diglot weave and cozy stories
- Rocket Languages
- Rosetta Stone — Aprender un Idioma
- RussianPod101 — Learn Russian Online with Our Podcasts
- Skritter
- Speak — The language learning app that gets you speaking
- Speaky
- Tandem Language Exchange App — Find Conversation Exchange Partners
- Texthelp
- UneeBee — Open-source interactive courses
- Voki
- WaniKani
- WordUp
- Xeropan
- Yabla
- Yask
Translator
- ⭐ DeepL Translator
- ⭐ Dialect
- ⭐ SpanishDict
- Apertium
- Babelfish.com
- Babylon Software
- Bing Translator
- ChatGPT Translate
- Crow translate
- dict.cc — German-English dictionary
- FilipePS/Traduzir-paginas-web — Translate your page in real time using Google, Bing or Yandex
- Glosbe dictionary
- Google translate
- HappyScribe — AI-Notetaker, Transcription, Subtitles & Translation
- Immersive Translate
- Interglot
- iTranslate — The Leading Translation and Dictionary App
- iTranslate — webapp
- Lexis Translator UGR
- LibreTranslate
- Linguee
- Lingva Translate
- Lingvanex — Machine Translation and Speech Recognition
- LOGOS translation
- Ludwig
- Nglish
- niedev/RTranslator · GitHub
- Office / Crow Translate · GitLab
- Online Doc Translator
- Opentrad — Traductor automático de documentos
- Ord (Wp words)
- PDFMathTranslate — PDF Translation with preserved formats
- Pinch — Real-time AI Voice Translation
- PONS translate
- Reverso Conjugator
- Reverso Context
- Reverso Dictionary
- Reverso Documents
- Reverso Expressio
- Reverso Grammar
- Reverso Synonyms
- Reverso Translation
- S3.Translator
- So Fanyi
- Spanish-English Dictionary
- SpanishDict (ingles.com)
- Systran Translate
- Systransoft Translator
- Tradukka
- Tradutor.cc
- Translate 100 Languages — Demo AI
- Translate Image
- Translate.com*
- translate.eu
- Translate.ru
- Translation with built-in AI — AI on Chrome | Chrome for Developers
- Translator.eu
- Web Translator
- WordMagic Soft
- WordReference
- Yandex.Translate
- Youdao
- Youdao Fanyi*
Learning Platforms
Academy
- ⭐ LickLibrary guitar lessons
- Academia MAI
- Academia Mega Canarias
- Academia Mundo Crypto
- AcademyDCG
- Aprende Institute
- Chessly — Learn chess
- Cisco Networking Academy
- Cursos de Buceo — Formación FEDAS CMAS
- Education.com
- Educreations
- El Club del Autodidacta
- Engineer4Free
- EspacioHonduras
- Free Certifications / — Find Free Professional Certifications Online
- Genially Academy
- GoStudent
- HubSpot Academy
- Hype4 Academy
- ITProTV
- Khan Academy — Free online, Courses, Lesson & Practice
- Lesson Planet
- Lightbox Academy
- MMDanza — Academia de baile
- Mojza
- OnlineLessons.tv
- OpenClassrooms
- Oppia — Free, Online and Interactive Lessons for Anyone
- Punished Props Academy
- Swimming by SN’T — Tutorials, Shop, Coaching, Workouts & Tips
- TeacherTube
- Tennis Academy Mallorca — Rafa Nadal Academy
- Tutellus
- UADIN
- Ucademy — La mejor academia para aprobar cualquier examen
- Unicoos
- unicoos
- Uniwebsidad
- Vertex School
- Webflow University
- YFDSFAM
Coding Academy
- 4 Geeks Academy
- Academia de Informática CEI Master PC
- AlgoMaster.io — Master Software Engineering Interviews
- Aprende Rust gratis — Curso desde cero con ejercicios
- Asabeneh/30-Days-Of-Python — 30 days of Python programming challenge is a step-by-step guide to learn the Python programming language in 30 days. This challenge may take more than100 days, follow your own pace. These videos may help too: https://www.youtube.com/channel/UC7PNRuno1rzYPb1xLa4yktw
- Be a Better Dev
- campusMVP
- Code Crafters — The Software Pro’s Best Kept Secret
- Code.org — Learn today, build a brighter tomorrow
- Codecademy
- CodelyTV
- codeSTACKr
- Codewars
- CodeWithAntonio
- Codexpanse
- Código Facilito
- Código sostenible
- Coding Bootcamp — Le Wagon
- DesarrolloWeb.com
- Devpost
- DevTalles
- FalconMasters
- Fazt web
- Fireship.io
- Free Code Camp — Learn to Code
- Frontend Masters — Learn JavaScript, React, Vue & Angular from Masters of Front-End Development!
- Full Stack Open
- Fullstack Academy
- InterviewBit
- Intrincity
- IQCode
- Joma Class
- JSCamp — Bootcamp gratuito y completo de Programación con JavaScript
- Laracasts
- Learn Ruby — Free Interactive Ruby Tutorial
- LemonCode
- Lighthouse Labs
- Low Level Academy
- makigas.es
- media.ccc.de
- midudev 👨💻 — Frontend, JavaScript, React, CSS, Performance
- objc.io
- Programming Hub
- Retos de Programación by MoureDev — Mejora tu lógica y portfolio
- Rustfinity — Learn and Practice the Rust Programming Language
- Scrimba — Helping developers
- SitePoint
- Skilled.dev
- Tech4U Academy — FP Informática ASIR | Ciberseguridad y eJPTv2
- The Odin Project
- Traversy Media
- Treehouse
- Tutorialspoint
- W3Schools Campus — Launch Your Tech Career with Coding Courses & Certificates
- wfTutorials — Recent Tutorials
English Academy
- Academia de inglés
- British Council
- Cambridge School
- EF
- EF English Live
- Escuela Oficial de Idiomas (La Laguna)
- GrupoVaughan
- Home Academia
- Inglessa
- Inglessa CV
- Kedaro
- Klensein
- Lingoda
- London School
- Oxford Online English
- Oxfordhouse BCN
Search Academy
- Academias.com
- Clases Fran
- Online Universities
- Sharing Academy
- Superprof
- TusClasesParticulares
- Universia
- unPROFESOR.com
Classroom
- Albert
- BigBlueButton Demo
- Blackboard.com
- BlinkLearning
- ClassDojo
- ClassLink — Single Sign-On for Education
- Clever — Single sign-on for education
- Easyclass
- GoConqr
- Instructure — Educational Software Development
- Kami
- QuizBean
- Schoology
- Showbie
- Socrative
- TeacherVision
- Tes
- Veyon — Cross-platform computer control and classroom management
- WebAssign
- WizIQ
Courses
- Learn Computer Science — Free Computer Science Education Online
Courses Platform
- 365 Data Science
- Aimchess — Learn Chess Your Way
- Alison
- AulaFacil
- Blockgeeks — Blockchain Education
- Building a Second Brain
- Career Foundry
- Chessable — Where Science Meets Chess
- Class Central
- Cursos Femxa
- Daily Page — courses
- Domestika
- Dummies
- Dymcanarias — Cursos SEPE Tenerife y Gran Canaria gratuitos
- E4You.org
- edX
- edX — W3Cx
- Emerald Codes
- Emprende Aprendiendo
- Formación online
- FutureLearn — Courses
- GCFGlobal — Free Online Learning
- Google Courses
- Highbrow — Learn Something New Every Day. Join for Free!
- HU — Online Courses
- HubSpot
- Imagina Formación
- Interaction Design
- LearnSQL.es — Cursos online de SQL
- Lenguia — Learn Languages with Comprehensible Input
- MappingGIS — Impulsa tu perfil GIS - Cursos SIG online
- Máster Marketing Digital
- MasterClass
- Mastermind
- Mis Cursos y Formación
- MIT OpenCourseWare
- Mountains — Filmmaking
- Nature Masterclasses
- OpenWebinars
- Platzi
- Platzi Courses
- Pluralsight — Online Courses, Learning Paths, and Certifications
- RStudio Cloud
- Scoolinary
- Scrimba — All courses
- Secretos de la Vida
- Shaw Academy
- Shaw Academy — Free Course
- SheCodes
- Simplilearn
- Skillshare
- Sochisi
- Soy Copywriter
- Springboard
- Studio — Online Classes
- Trazos.net
- Tuts+
- Udacity
- Udemy
- Universal Arts School
- Video School
- W3Schools Courses
- World Science U
Personal Courses
- adventJS
- Affinity Photo Tutorials
- Aprende Magia con Luis Piedrahita
- AutomatingOSINT
- Backtrack Academy
- BobTabor
- Canarias Photo Tours
- Centro Canario de Formación Marítima
- CiberPatrulla
- Coding Blocks Online
- CodingCat.dev
- Creatubers
- CS50x 2023
- Curso de Meteorología
- Curso fotografía Marcos Alberca
- Cursos Securizame
- Dark Web Academy
- Datacamp
- EDteam — En español nadie te explica mejor
- egghead.io — Expert led courses for front-end web developers
- Eyedesyn
- FocusArte — Historia del Arte Clásico con Ter
- Formaciones oficiales socorristas
- Fotodidacta
- Freelance Mastery
- GameDev.tv — We help game developers learn and grow
- Ground Control Film
- Hack4u
- HARMONICLASS — Learn Harmonica with Indiara Sfair
- Lectura Ágil
- Lord Music Academy
- Mike Dane
- mouredev pro — Estudia programación y desarrollo de software
- Musihacks
- Network Chuck
- OfficeFacil.com
- Online Motion Design School
- OpenLearn — Open University
- PAPA React — Zero to Full Stack Hero
- Part-Time YouTuber Academy
- Píldoras Informáticas
- Programa OEA-CISCO
- ProgramarYa
- Religious Literacy — Traditions and Scriptures
- Render2web
- Rubenguo
- Santi Younger Courses
- Savvynik Learn
- Skyline Motions
- The Open University
- The Security Sentinel
- Web Dev Simplified
- Webtraining
- Yes I’m a Designer
Search Courses
- AFS Formación
- Avanzaentucarrera
- Caja de Letrass
- Course Hero
- Coursera — Degrees, Certificates, & Free Online Courses
- Cruz Roja — Fórmate
- Cursos
- Docentia
- Educaweb
- Emagister
- Fifede
- Hotcourses Latinoamérica
- Miríadax
- Servicio Canario de Empleo — Cursos
- Study.com
Music Theory
- Christofmusic
- FreePats project — Sound banks
- imusic-school
- Learn Classical Guitar Online — Free Lessons and Music
- Learn Electronic Music Production
- Liberty Park Music
- LikeTones — Learn to play musical instruments
- Music Machinery
- Musicca — Learn music theory for free
- muted.io — Magical Music Theory Tools to Learn Music Online for Free
- National Guitar Academy
- OnlinePianist — Piano Tutorials & Lessons for Popular Songs
- SoundGrail — Music Theory App - Learn Music Theory Online Free
- Swift Guitar Lessons
- TrueFire
Plant Identifier
- BirdNET Sound ID — The easiest way to identify birds by sound
- Blossom — Conceptivapps
- Flora Incognita
- PictureThis — Plant identifier
- Pl@ntNet
- Plant Identification
- Plant.id
- Plant.id
- PlantSnap
Religion
- ePrex — Saints
- EVANGELIZO
- iBreviary
- Rezandovoy — Rezandovoy
Bible
- ⭐ Bolls Bible
- Bible
- Bible 365
- Bible Gateway — 12 NIV
- Bible Hub
- Bibledex
- Bibledit — Bible Translation Software
- BibleGateway
- BibleGateway-to-Markdown
- bibletime/bibletime · GitHub
- Biblia Paralela
- BibliaTodo
- Blue Letter Bible
- Bolls Bible
- Die Bibel
- Documenta Latina
- Ethiopic Bible
- Hebrew Codec
- Online Bible — Find Equidistant Letter Sequences (ELS Codes)
- World English Bible
Science
Alter Science
Alchemy
Astrology
- Astro.com
- ASTROLABE — Solar Fire V9
- Astrolink — Mapa Astral Gratuito
- Astrolog Website
- Astrology & Spirituality Resources
- Astrology Clock
- Astrology Library
- Astrology symbols
- Astrology Zodiac Signs
- Astrology.com
- AstroMatrix Horoscopes — FREE Birth Charts and Daily Horoscopes
- AstroMatrix Horoscopes — FREE Birth Charts and Daily Horoscopes
- Authority Astrology — AI Astrology & Chart Interpretations
- Cosmograma
- FUTOORO
- Prague Clock — Wijzerweb
- Sanctuary
- Signos del Zodiaco
- Starla App — Astrology & Soulmate Drawing
- Vedic Astrology (Jyotish) Software From GeoVision Software Inc.
Chiromancy
Kabbalah
Numerology
Tarot
Applied Science
Astronomy
- Ap-i.net
- AstroAfición
- Astrofísica y Física
- Astrofotografia amateur por Sideribus
- Astronomos.org
- Astronomy 535 — Observational Techniques
- Cloudy Nights
- COBS
- Down2Earth
- Earth Snapshot
- El Cielo de Canarias
- Grupo Amateur de Meteorología Espacial
- Heavens-Above
- Helioviewer.org for student
- In-The-Sky.org
- JHelioviewer
- Lanzamientos espaciales
- Lunar Reconnaissance Orbiter Camera
- New Horizons
- Planetario de Madrid
- Redshift-Live
- ServiAstro
- Space 4 everybody
- Spider’s Seds
- Sunspots and active regions today
- The Nine Planets
- uphere.space
- Virgo GW
- Who Is In Space?
- Windows 2 Universe
Computing
- ⭐ DevDocs.io /
- ⭐ Devhints /
- ⭐ Linux Commands Library
- ⭐ The OSI-Model in a simple way
- ⭐ W3Schools — Online Web Tutorials
- .NET Academy
- 30 seconds of code
- 100 Exercises To Learn Rust
- Abrirllave
- alg0.dev / — Algorithm Visualizer
- Aprenderaprogramar
- ASCII Codes
- Ask Python
- Automate the Boring Stuff with Python
- Awesome Cheatsheets
- Baeldung
- Blocks.org
- Boot.dev — Learn Backend Development the Fun Way
- C# Corner
- Cheat-Sheets.org
- Cheat.sh
- CheatSheets.zip — Ultimate Cheat for Developers
- Choose a License
- CodeChef
- Codédex — Start Your Coding Adventure ⋆˙⟡
- CodeEasy.io
- Crafting Interpreters
- CS1000
- CSS-Tricks
- CSSBlog
- CTAN — Comprehensive TeX Archive Network
- Curl project
- Desarrollo Web Tutorial
- Design+Code
- Developer Roadmaps
- Dot Net Perls
- EbookFoundation/free-programming-books · GitHub
- El Pythonista
- Entre Llaves
- Floating Point Math
- Free Frontend
- GeeksforGeeks
- Git Cheat Sheet
- Guru99
- Hackr.io
- Happy Coding
- Home and Learn — Computer Courses
- Hot Scripts
- HTML-online
- HTML5 Doctor
- Interactive Vim tutorial
- JavaScript Kit
- JavaScript Tutorial
- Javatpoint Tutorials
- Jquery AZ
- KeyCombiner — Master Keyboard Shortcuts
- La Web del Programador
- Learn C — Free Interactive C Tutorial
- Learn Elixir
- Learn How To Make a Website with Steph
- Learn JavaScript
- Learn JavaScript
- Learn Programming & Websites About Software Development — start.me
- Learn Razor Pages
- Learn to Code From Zero with Godot
- Learn To Code Together
- LearnKu
- Lenguaje HTML
- Lenguaje Javascript
- LenguajeCSS
- LogicBig
- Material Curricular Libre
- MDN Web Docs
- Microsoft/Web-Dev-For-Beginners · GitHub
- Modern CSS Solutions
- Nacho Cabanes — Cursos
- Net-Informations
- Network Learning Platform — Packet.School
- newline.co
- Parse Platform
- php[architect]
- Programiz
- Programming Historian
- Python Tutorials — Real Python
- Quackit Tutorials
- QuickRef.ME — Quick Reference Cheat Sheet
- React Cheat Sheet
- Refactoring and Design Patterns
- RipTutorial
- SoloLearn
- Spck Editor — Explore Labs
- SQL Tutorial — Essential SQL For The Beginners
- SQLBolt — Learn SQL - Introduction to SQL
- SQLFlow — Visualize SQL
- SS64 Command line reference
- State of JavaScript
- Studytonight
- Style Stage
- Tek Eye
- Terminal de Linux
- TeXample.net
- The DotNet Guide
- The Web Platform — HTML5
- Three.js Fundamentals
- Tutlane
- Tutorial Kart
- TutorialBrain
- Tutoriales Programacion Ya
- TutorialsTeacher
- Tutorialzine
- Vim Cheat Sheet
- Vimdoc
- W3resource
- W3Schools.blog
- web.resource.org
Machine Learning
- ⭐ Distill
- ACL Anthology
- Algorithmia
- Alias-i, Inc.
- Deep Learning
- Elements of Statistical Learning
- fast.ai
- GLUE Benchmark
- ImageNet
- Kaggle — Machine Learning
- KDnuggets
- LLM Visualization
- MachineBox.io
- MediaPipe — Google for Developers
- MLCommons
- ONNX
- ParlAI
- Pix2Pix
- SageMaker Studio Lab
- scikit-learn — machine learning in Python
- SOUL.md — What Makes an AI, Itself?
- SuperGLUE Benchmark
- The Gradient
- Transformer Circuits Thread
- Transformer Explainer / — LLM Transformer Model Visually Explained
- Transformers, the tech behind LLMs — Deep Learn… | 3Blue1Brown
- vas3k
- Vas3k — Machine Learning
Programming Documentation
Supercomputing
- Barcelona Supercomputing Center
- CSCS Swiss National Supercomputing Centre
- Fugaku — RIKEN Center for Computational Science RIKEN Website
- Lawrece Livermore National Laboratory
- Los Alamos National Lab
- LRZ — Leibniz Supercomputing Centre
- NCSA at the University of Illinois
- Oak Ridge Leadership Computing Facility
- Post-K (Fugaku)
Engineering
- eFunda
- Electronic Schematic & Circuit Diagram — Tutorials | Datasheet
- Eng-Tips Engineering Forums
- Engineering ToolBox
- Engineering360
- Engineers Edge
- Fun-Engineering.net
- GrabCAD
- Sengpiel Audio Berlin
Geography
- Cartography Unchained
- Department of Geography
- Geographic.org
- Geography Realm
- GeoNames
- GIS Lounge
- PAT · Portable atlas
- The True Size
- WorldAtlas
Geology
- Geological Society of India
- Geological Society of London blog
- Geology.com
- GeoScienceWorld
- Learning Geology
- VolcanoDiscovery
Medicine
- BioDigital Human Platform
- Blog de Fisioterapia
- Centro de Medicina — Medicina Par Biomagnético
- ClinicalKey
- Genotipia
- GlobalRPH
- Harvard Medical School
- iDoctus
- Innerbody — Research for Your Most Important Health Purchases
- LearningGNM
- Medicine
- MSD Manuals
- PortalesMedicos
- UniProt
- Wikimedicine.org
Philosophy
- Daily Stoic — Stoic Wisdom For Everyday Life
- Filosofía.org
- Philos Digest
- Philosophy Now
- PhilPapers
- The American Philosophical Association
- The Metaphysics Research Lab
Basic Science
Biology
- Age of Biology
- Ant Maps
- ASMscience
- Biología literaturamagica
- BMC
- BTO
- iBiology
- Learn.Genetics
- PLOS Biology
- ProDy (Protein Dynamics and Sequence Analysis)
- The Fundamentals of Neuroscience
Chemistry
- Chemix
- Chemweb
- Formulación química
- Manual da Química
- MolView
- PeriodicTable.com
- PeriodicTable.pro
- PeriodicTable.tech*
- Ptable.com
- Químicaorgánica
- World of Molecules
- XuMuK.ru
Maths
- CalcMe
- Combinatorics and more — Gil Kalai’s blog
- Dario Alpern (maths & assembler)
- Ekuatio
- Estadística
- Fernando Revilla — Docencia matemática
- FlowingData
- Geometría dinámica
- Gitit.net
- House of Graphs
- Immersive Math
- Integrales Irracionales
- Interactive Mathematics
- IXL — Ejercicios de Matemáticas
- Matemáticas — Khan Academy
- Matemáticas IES
- MateMovil
- Material profesor mates
- Math is Fun
- Math2.org
- Math24
- Mathematics LibreTexts
- Mathscribe
- Millennium Mathematics Project
- Numbermatics
- Olimpiada Matemática Española
- Project Euler
- Proofs and Prompts — Notes from the common room
- Real Sociedad Matemática Española
- Scissors Congruence
- Sector Matemática
- Seeing Theory
- Series de Fourier
- Sr Examen
- STHDA
- Weekly Mathematics
- Whistler Alley Mathematics
- WIRIS
- Wolfram MathWorld
- Wumbo.net
- Xm1 Math
- Zweigmedia — Finite mathematics
Physics
- Academia Ciencias Galilei
- Applied Ballistics
- Atmospheric Optics
- Curso Interactivo de Física
- Falstad — Math, Physics, and Engineering Applets
- Física con ordenador
- Física Práctica
- Física UPM
- Física y Química (Heurema)
- Fisicalab
- FisQuiMat
- HyperPhysics Concepts
- La web de Física
- Laplace — Física US
- oPhysics
- Paul Falstad
- PhotoVoltaic Education
- Physclips UNSW
- Physics — Science
- Physics About
- RefractiveIndex.info
- Termodinámica documentation
- The Feynman Lectures on Physics*
- The Physics Classroom
- The Physics Hypertextbook
Social Science
Archeology
Economics
History
- American History
- American History
- ChronoZoom
- Country Studies
- Enciclopedia de Historia
- Histomap Reborn — World History Timeline (4000 BC - Today)
- Historia
- Historia de España
- Historiasiglo20
- Historic UK
- History Hit
- Historycentral
- HistoryWorld — History and Timelines
- MyLens
- Oldera — Timeline of History
- SobreHistoria.com
Journalism
- Columbia Journalism School
- Journalism & Media
- Periodismo.com
- Periodismo.net
- School of Journalism
- UNC Hussman School of Journalism and Media
Labour Orientation
- AquíHayFOL
- FOL en Tiempos Modernos
- FOLCanarias
- Habilidad Social
- La Constitución Española de 1978
- Prevención de Riesgos laborales — Blog
- Tiempos Modernos — Jornada laboral
Linguistics
- Behind the Name
- Centro Virtual Cervantes
- El Castellano
- Enclave RAE
- Gematria Starryabode
- GGG — Guia Guanye-Godo
- Instituto Cervantes
- Poemas del Alma
- Profesor lilemus
- Recursos — RAE
- Wordsmith.org
Literature
- 30 blogs de literatura
- Aesop’s Fables
- Biblioteca Virtual Miguel de Cervantes
- Cursos de latín online — Samuel González
- Escritas.org
- Escritores.org
- Escritura Creativa
- For Better for Verse
- Lecturalia
- Libros Maravillosos
- Literautas
- The Victorian Literary Studies Archive
Political Science
- Department of Political Science — College of Liberal Arts and Sciences
- Department of Political Science — University of Pittsburgh
- Duke University Political Science
- Political Science — Columbia
- Political Science — Stanford
Juridical Concepts
Political Test
Psychology
- ⭐ 16Personalities — Free personality test, type descriptions, relationship and career advice
- BetterHelp
- Personality Test — NERIS Personal Quest Explorer (NPQE)
- Psicología y Mente
- Psicología-Online
- Psychology Today
Simulator
- 3D Conway’s Game of Life /
- Airplane Simulation — Walter Bislins
- Automating the Search for Artificial Life with Foundation Models /
- Cellular Automata Laboratory
- daneelsan/Wireworld — a Turing-complete cellular automaton suited for simulating logic gates and other real-world computer elements
- DigiSim — Digital logic, taught and built. Gate to 8-bit CPU.
- eCalc — reliable electric drive simulations
- gabe565/cli-of-life — Play Conway’s Game of Life in your terminal
- Golly Game of Life /
- HEC-HMS
- Holocloth
- JaamSim Pro
- Lenia — Continuous Cellular Automaton
- Lenia3D
- Microcosmos / — Artificial Life Institute
- NI — LabVIEW
- NOBOOK Virtual Laboratory
- OpenRocket Simulator /
- PhET Simulations — University of Colorado Boulder
- Pražský Orloj — Prague Astronomical Clock Simulator
- simulator.io — Build and simulate logic circuits
- swarm-subnet/Langostino — An open-source autonomous drone platform using ROS2 and AI-powered flight control
Optical Simulator
- Bending Light — Phet Colorado
- CAXCAD Optical Design Software — CAXCAD
- OpticalRayTracer Home Page
- Ray Optics Simulation — PhyDemo
Planetarium
- ⭐ Stellarium Astronomy Software
- da-luce/astroterm · GitHub
- Fifth Star Labs
- Planetary Motion
- sky-map-team/stardroid · GitHub
- Skychart /
- Skyfield — documentation
- SkySafari 7 — Professional Telecope Astronomy Software
- Star Walk 2
- Starry Night 8
- Starry Night 8 — Astronomy Telescope Control Software for Mac/PC
- Stellarium Labs
- Stellarium Web
- TheSkyLive.com
Study Resources
- Adducation
- Chegg
- chiphuyen/aie-book · GitHub
- ClubEnsayos
- Docsity
- eduCBA
- eduMedia
- Estudyando
- Filadd
- HomeworkLib
- KnowledgePicker
- Materiales de Clase
- OneClass
- OpenStax
- Quizlet — Learning tools, flashcards, and textbook solutions
- Rincón del Vago
- Studenta — Resuelve tus dudas y estudia diferente
- StuDocu
- studylib.es — Apuntes, Exámenes, Prácticas, Trabajos, Tareas
- Testbook
- TutFlix — Free Education Community
- With Orbit
- Wuolah — Apuntes, ejercicios y exámenes resueltos gratis
Subjects Resources
- ⭐ Cheatography
- Academo.org
- Alegsa
- Apuntes DAM y DAW gratis — temario, ejercicios resueltos y test
- Astronomía Educativa
- Earth How
- eChalk
- Educaplus.org
- Instructables
- Liveworksheets
- Mathigon
- SparkNotes
- Temas de Tecnologia
- Thermopedia
- Tiching
Typing
- ⭐ ZType — Typing Game
- 10FastFingers
- AgileFingers
- bragefuglseth/keypunch — Practice your typing skills
- EduTec
- How to Type — WikiHow
- Keybr — Typing
- kraanzu/smassh — Smassh your Keyboard, TUI Edition
- Monkey Type — Typing Test | monkey-type.org
- Monkeytype — A minimalistic, customizable typing test
- Nitro Type
- Pazl27/typy-cli — Minimalistic Monkeytype clone for the CLI
- SpeedTyper.dev — Typing practice for programmers
- TypeLab.org — Typing Lessons, Speed Tests, and Games
- Typelit
- TypeRacer
- TypeRush — Worldwide League of Typing Racers!
- TypeStep — Typing Practice
- Typing.com