tldr-pages/extldr

EbookFoundation/free-programming-books is a community-curated collection of freely available learning resources for programming. Originally a clone of a StackOverflow list, it was moved to GitHub for collaborative maintenance and is now administered by the Free Ebook Foundation. The repository organizes resources into categories like books (by language and subject), cheat sheets, online courses, interactive tutorials, problem sets, podcasts, screencasts, and programming playgrounds. It offers content in English and a wide array of other languages, and users can search the collection via a dedicated website. All content within the repository is licensed under CC-BY-4.0.

The Algorithms - Python is an open-source collection of algorithm implementations written in Python, maintained by the TheAlgorithms organization on GitHub. The README frames the whole project as a teaching resource: the code exists to illustrate concepts, can run slower than Python's built-in equivalents, and is indexed in DIRECTORY.md for browsing. It's MIT licensed and has 223,712 stars and 50,966 forks on GitHub.

Awesome Go, maintained at avelino/awesome-go, groups Go frameworks, libraries, and software into topic categories including Actor Model, Artificial Intelligence, Audio and Music, Authentication and Authorization, Blockchain, Bot Building, and Build Automation. Every linked entry gets a short description instead of a bare URL. The repository carries an MIT license, has 180,946 stars and 13,482 forks on GitHub, and takes new entries through pull requests reviewed against its own contribution guidelines.

Master programming by recreating your favorite technologies from scratch.