signal-cli provides an unofficial commandline, JSON-RPC and dbus interface for the Signal messenger.

A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others

Model-rocketry aerodynamics and trajectory simulation software

A library for writing CZML content for use with Cesium.

xowa offline wiki application

Kisrhombille geometry classes and methods

A framework for mission control