Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
X3D is the open-standard format for 3D graphics scenes on the Web.
Open-DIS implements the IEEE DIS protocol in multiple languages.
tiny code, html webcam game or plug brain in each blob, java server
A server to exchange flightplan information between ATCs
The free and Open Source hockey simulator
DSOL: A Distributed Simulation Object Library implemented in Java
Bringing Plato's Symposium to VR
SuperWikia: The Runtime/Realtime Environment for Codesmiths
Modular Minecraft server plugin - commands, events, ...
Qt/Linux based software to control model railways