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The https://freeCodeCamp.com open source codebase and curriculum. Learn to code and help nonprofits.
Turn any program that uses STDIN/STDOUT into a WebSocket server. Like inetd, but for WebSockets.
Node.js based forum software built for the modern web
Vanilla is a powerfully simple discussion forum you can easily customize to make as unique as your community.
The Laravel.io Community Portal
:notes: A modern community forum written in Java. 一个现代化的 Java 社区论坛。
Hack Club is the worldwide movement of free student-led coding clubs
Kontalk official Android client
Yet another project to get beginners contributing to open source
All those android development sources that you need to be and stay awesome!
Template for writing your own contributing guide