Brekel Kinect (free)
Brekel Kinect is an application using a Microsoft Kinect, and PrimeSense’s OpenNI and NITE.
It allows you to capture 3D objects and export them to disk for use in 3D packages. As well as do skeleton tracking which can be streamed into Autodesk’s MotionBuilder in realtime, or exported as BVH files.
It is free for personal and commercial use and will remain so, just don’t expect any new updates, bug fixes or official support.
Be sure to check out the user forum to help each other out.