Hey over there!
I developed as technical part of my Master Thesis in Computer Sciences the DirActNI framework (Direct Acting Natural Interface) for the implementation and evaluation of contactless (whole-body) 3D interaction techniques based on depth sensors like the Kinect.
The DirActNI framework provides the possibility of a natural and immersive whole body interaction in virtual environments. The user controls the environment directly and totally contactless to any physical controllers or sensors.
You can watch the video on Youtube: