freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

"The mother of all demo apps" — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more

Apache ECharts is a powerful, interactive charting and data visualization library for browser

IDE-style autocomplete for your existing terminal & shell

The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

Full featured open source sudoku with a very nice web interface.