FaceTrackNoIR is described as 'is only available for Windows-based PC's (sorry, we have to start somewhere) and has been succesfully used on XP, Vista and Windows 7'. There are six alternatives to FaceTrackNoIR for Windows, Linux, Self-Hosted solutions and Mac. The best alternative is GiMeSpace Cam Control, which is free. Other great apps like FaceTrackNoIR are FreeTrack (Free, Open Source), linux-track (Free, Open Source), Handsfree.js (Free, Open Source) and VSeeFace (Free Personal).
Head tracking software for webcams, Nintendo Wii Remotes and NaturalPoint cameras (TrackIR, SmartNav and OptiTrack). Tracks a variety of customizable model configurations with up to six degrees of freedom.
Head tracking software for TrackIR and SmartNav cameras that provides game profiles, calibration curves, hotkey controls and a 3D display for testing. Works with TrackIR Enhanced games as well as specified mouse, keyboard and joystick emulation software.