Open Source MMORPG Framework
Arianne is an engine to develop multiplayer online games like Stendhal
3D .NET engine for Windows, Linux, Mac
c# lua bind with unity3d project for game development
Free strategy browsergame engine.
Modular Gaming Open Source Persistent Browser Based Game Framework
Library for creating turn-based games with simultaneous moves.
Open source network game service
Rock cms, un script php que piensa por si mismo.
CLM for Joomla! 1.5 + 2.5
Moteur de jeux de rôles descripifs (RP) en PHP
Cross-platform 2D game engine
Ragnarok Cliente nativo para Gnu/Linux
Zap Engine
Atlarius is no longer under development.