The Open Descent Foundation (ODF) is a community for developers, who want to help to create open source programs, tools, etc. for the famous games Descent1, -2 or -3. Everyone can join the ODF if he accepts the idea of writing open source programs.
OpenTCI - A GPL-Compliant Open Source SW/HW Effort to produce quality electronic replacement/-racing Devices for Motorbikes in private or racing sports use.
SSF aims at providing an easy to use and efficient framework for physics sim & visuals in small scientific simulations in real-time, as well as games, which are inherently real-time applications.