Open Source Virtual World and MMOG Development Platform
3D Client (Windows), Server, and Tools to easily create massively multiplayer games and virtual worlds.
If you want to contribute to the source code please go to https://github.com/multiversemmo/MultiversePlatform
Geist3D is a graphics engine complete with an integrated development environment. It combines an extensible Scene Graph API with a Petri Net runtime kernel, the Lua scripting engine and rigid body physics.