https://webcammotioncapture.info
You can send out the Hand and Finger Tracking data using the VMC protocol.
The Hand and Finger Tracking with Only Webcam is now available on any apps supporting the VMC protocol such as VseeFace, Unity, etc!
You don't need any special devices like Leap Motion.
Both Windows and Mac versions are available.
VSeeFace
https://www.vseeface.icu