TrackIR - TrackIR adds depth to the PC gaming experience by enabling players to take control of the in-game view.
Sculptura - 3D sculpting for everyone
linux-track - Linuxtrack is a software bringing headtracking to Linux and Mac OS X.
PaintCube - Web-based 3D painting software
VSeeFace - VSeeFace is a free, highly configurable face and hand tracking VRM and VSFAvatar avatar puppeteering program for virtual youtubers with a focus on robust tracking and high image quality
Nomad Sculpt - Nomad is a sculpting & painting mobile app, available on Android and iOS.