Programming eXperience Toolkit
Fast, user-friendly cross-platform custom launcher for Minecraft
Accuracy-focused XNA4 reimplementation for open platforms
One framework for creating powerful cross-platform games
GemRB is a portable open-source implementation of the Infinity Engine
LDraw™ editor for LEGO® style digital building instructions.
Real-time collision detection and multi-physics simulation for VR
a game library to develop audio games