Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
Set of utilities for Opensim servers running on Linux
Open-DIS implements the IEEE DIS protocol in multiple languages.
3D urban environment renderer : browser-app ; as well as a GTA clone
The free and Open Source hockey simulator
SuperWikia: The Runtime/Realtime Environment for Codesmiths
Bringing Plato's Symposium to VR
Air Warriors is An exciting flying fighting game, shoot the airplanes
Modular Minecraft server plugin - commands, events, ...
A open-source online football manager like hattrick
Tool for Wide Area Measurement System
A simulator which hasn't been finished.
Space Exploration Game
Qt/Linux based software to control model railways