A collective list of free APIs

🎓 Path to a free self-taught education in Computer Science!

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

Robotic Development Kit (RDK) for Flexiv robots. Supports C++ and Python. Compatible with Linux, macOS, and Windows.

A tool for managing chaos cache keys.

🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

diff tree nodes like React

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

A UI library by WeChat official design team, includes the most useful widgets/modules in mobile web applications.

Background Music, a macOS audio utility: automatically pause your music, set individual apps' volumes and record system audio.