Educational

The Cyber Swiss Army Knife. Simple, intuitive web app for encoding, decoding, encryption, parsing, and data format conversion in browser.

Fast, offline-capable, and unified API documentation browser combining 100+ programming language and framework specs into one single UI.

Learn to code for free with hands-on interactive curricula, coding challenges, and verified developer certifications in web, data, and ML.

Harvard University's legendary introduction to the intellectual enterprises of computer science and the art of programming.

Free world-class education for anyone, anywhere. Interactive math, physics, biology, history, and computer programming courses.

Definitive digital repository of scientific journal articles, academic papers, textbooks, and general interest fiction and non-fiction.

Interactive, beginner-friendly learning roadmap covering command line basics, permissions, networking, process management, and kernel modules.

Comprehensive, open standard documentation for HTML, CSS, JavaScript, and Web APIs maintained by Mozilla and the developer community.

Free publication of virtually all MIT course content, including complete video lectures, syllabus notes, assignments, and exam archives.

Non-profit educational initiative based at Rice University publishing peer-reviewed, openly licensed college textbooks completely free.

Library of over 70,000 free, digitised public domain eBooks proofread by thousands of volunteers, available in EPUB and Kindle formats.

Non-profit digital library offering free universal access to billions of archived web pages, historical software, audio recordings, and books.

The world's largest free, multilingual collaborative encyclopedia with tens of millions of open-source articles across human knowledge.