facebook/react

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

Awesome lists about all kinds of interesting topics - sindresorhus/awesome.

Algorithms and data structures implemented in JavaScript with explanations and links to further readings.

An opinionated list of awesome Python frameworks, libraries, software and resources.

Freely available programming books.

freeCodeCamp.org's open-source codebase and curriculum.