Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

Desktop client for Matrix using Qt and C++20.

LibreCAD 3 is a next generation 2D CAD application written to be modular, with a core independent from GUI toolkits. Scripting is possible with Lua.

Demos the new Android Design library.

A game made in unity in which you control a submarine and avoid torpedoes.

An open source version of a game engine developed by Croteam for the classic Serious Sam games.

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