Arianne is an engine to develop multiplayer online games like Stendhal
An isometric arcade-style game of skill, puzzles and exploration
2D Game Engine
3D .NET engine for Windows, Linux, Mac
Single-/multi-player card game Mau Mau (similar to UNO®)
evolution for vegastrike SpaceSim/Combat/Trade game
Java decentralized cross-platform network multiplayer game engine
TurboSphere is an easy to learn and powerful JS based game engine.
A retro style video game engine for RPGs and adventure games.
Open source network game service
An extensible development framework for roleplay games.
Cross-platform 2D game engine
Ragnarok Cliente nativo para Gnu/Linux