Blender - Blender is the open source, cross platform suite of tools for 3D creation.
TrackIR - TrackIR adds depth to the PC gaming experience by enabling players to take control of the in-game view.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
FaceTrackNoIR - FaceTrackNoIR is only available for Windows-based PC's (sorry, we have to start somewhere) and...
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
linux-track - Linuxtrack is a software bringing headtracking to Linux and Mac OS X.