During the latest Hackathon Art-A-Hack 2016 I've participated, our team have been working on an open source Unity package for multi-user full-body tracking Virtual Reality experience for SamSung VR gear called KinectVR.
Through the five weeks (five Saturdays), we've explored and built new features based on original KinectVR, developed by Filip Baba. Those features including live rigging for multiple users, game character switching, game scene switching, live skeleton tracking for up to 6 users, physical interactions between users and much more.
Here are some demos of the progress and at showcase for the Art A Hack.
Visit http://kinectvr.com/ for more info and package download