CTFs as you need them
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
Fully fledged steam community SDK
Cross-platform reimplementation of AMOS BASIC (runtime)
Investigo - DX9 Performance and Debugging Toolkit
Create your own online real-time browser-based MMO in your website
A generic C++ MUD server featuring a strategy-style hexagon map