VeeR VR - Global VR video community
TrackIR - TrackIR adds depth to the PC gaming experience by enabling players to take control of the in-game view.
VRChat - Create and play in virtual worlds with others
Eyeware Beam - Turn your phone into an eye & head tracker!
Spatial - Collaborate from anywhere in AR
FaceTrackNoIR - FaceTrackNoIR is only available for Windows-based PC's (sorry, we have to start somewhere) and...