multikinect
MultiKinect provides high-level, simulatenous access to multiple Kinect 2 sensors concurrently. Under the hood, it depends on libfreenect2 for actual Kinect library calls.
Requirements
This is tested on Visual Studio 2015 U3 on Windows 10 1511. Follow instructions to make libfreenect2, and then change Visual Studio project options with the proper lib / inc directories (which depend on your environment).