GemRB is a portable open-source implementation of the Infinity Engine
OpenSource and DIY real electronic darts game
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Enhance useful field of view, speed of responsiveness, brain exerciser
Coin collecting software for organize and manage your own catalogue
Cross platform 2D game creation framework with Python bindings
A powerful cross-platform and open-source 3-D rendering engine.