What are some current wrapper solutions for using the Kinect with Unity? The initial primesense one seems not to be in active development.
I'm aware of the Zigfu one, however are there any open-source alternatives?
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Why not use the oficial Microsoft Kinect SDK? It's a .NET assembly that can be added as reference to a normal C# project.
You can download the SDK from here: http://www.microsoft.com/en-us/kinectforwindows/develop/developer-downloads.aspx