>>272623980
vrchat or neosVR, kind of. Neither is as geared towards streaming like virtualcast, but you can still replace the game mirror window with an in-game camera and record that, and you have rigged humanoids at your disposal.

>>272624390
https://sites.google.com/view/vdraw/ maybe? It's not full head/hand tracking, just a lipsynced avatar for when you're streaming desktop stuff.