Arianne is an engine to develop multiplayer online games like Stendhal
A fun realistic multiplayer free-and-open-source first-person-shooter!
Massive Multiplayer Online Wargame Leveraging the Internet
Game engine allows you to create own MMORPG
3D urban environment renderer : browser-app ; as well as a GTA clone
Free strategy browsergame engine.
The free and Open Source hockey simulator
XMICAE is a framework for browser-based IF/RPG narratives.
JavaScript chess with board rotation, pgn output, forward/back & save
SuperWikia: The Runtime/Realtime Environment for Codesmiths
DotA Statistics
Zap Engine
Goodwizz Social Network with matchmaking with 110K members