Apps & alternatives to 3D camera's

Apps that can do body ~~tracking~~ tracking for your mobile ~~devices~~ devices

ZIGSimPro
an app that turns your phone/tablet into a depth sensor & tracking camera (over OSC)

iKeleton OSC
an app that turns your phone into body tracking camera (over OSC) sending X&Y coordinates

Media Pipe*
MediaPipe is a cross platform Framework for building machine learning pipelines for processing time-series data like video, audio, etc.
Amongst many other possibilities it turns your webcam into a depth/tracking camera.

Mocap: ~~optitrack~~ optitrack
The Blackboxes at HKU are equipped with High End Mocap systems: using Infrared Cameras & mocap suits (reflective elements)

Mocap: Vive 2x 2x TBD
~~Vive~~ Vive trackers
Vive Ultimate trrackers

Face Mocap using ANY Camera
(Blender)

https://youtu.be/1Ygq9052RSk

Wekinator

Software for real-time, interactive machine learning

free, open source software. created by Rebecca Fiebrink.