shroom.sh
digital mycelium network
Archive.org
Internet Archive - digital library of books, movies, music, and more
Archive.ph
Web archive service for preserving webpages
Cyberchef
cyber swiss army knife for encryption, encoding, compression and data analysis
Diaspora
Distributed social networking platform
freeCodeCamp
Free coding bootcamp with interactive lessons and projects
Hacker News
Technology news and discussion
HathiTrust
Digital library partnership for academic books and materials
iNaturalist
A community for naturalists to record, share and discuss observations of nature
IT-Tools
collection of handy online tools for developers
Khan Academy
Free world-class education for anyone, anywhere
Lemmy
Federated link aggregator and forum
LibreTranslate
free and open source machine translation api
LibriVox
Free public domain audiobooks read by volunteers
Lichess
Free online chess server with analysis tools
Lobste.rs
A computing-focused community
Mastodon
Decentralized social networking platform
Matrix
Decentralized chat and communication
MDN Web Docs
Resources for developers, by developers
MIT OpenCourseWare
Free MIT course materials online
MonkeyType
a minimalistic and customizable typing test
Open Culture
Free cultural and educational media
OpenLibrary
Open library with free book lending and reading
OverTheWire
Free wargames and security challenges to learn Linux and cybersecurity skills
PeerTube
Decentralized video hosting platform
Pixelfed
Federated photo sharing platform
PrivateBin
minimalist, open source online pastebin
Project Gutenberg
Free ebooks of public domain literature
ScribbleRS
free and privacy respecting pictionary game
SearXNG
privacy-respecting, hackable metasearch engine
The Odin Project
Open source full-stack web development curriculum from beginner to job-ready
VERT
open source, fully local*, free file converter
Wikibooks
Free textbooks and educational resources
Wikimedia Commons
Repository of free-use images, sounds, and other media
Wikinews
Free-content news source
Wikipedia
Free online encyclopedia
Wikiquote
Collection of quotations from notable people and works
Wikisource
Free library of source texts and documents
Wiktionary
Free dictionary and thesaurus
Zooniverse
World's largest citizen science platform with projects across astronomy, biology, and climate