Recently I created a slightly updated version of RUIS that supports Perception Neuron. It’s a Unity 5.6 project, which you can download here:
There was a bug in one of the newly added scripts that made the head & HMD direction matching (and yaw drift correction) work only half of the time. The bug can be fixed by replacing line 124 in RUISYawDriftCorrector.cs from
driftVector = Quaternion.Euler(0, -Vector3.Angle(driftingForward, driftlessForward), 0) * Vector3.forward;
driftVector = Quaternion.Euler(0, ((Vector3.Cross(driftingForward, driftlessForward).y < 0)?-1:1) * Vector3.Angle(driftingForward, driftlessForward), 0) * Vector3.forward;
Please note that for now this is an unofficial release, and the Download page still links to the old RUIS 1.10 file, which doesn't have Perception Neuron support. A new, official RUIS release will come out later this year.
The project contains a new example scene (RUISViveNeuron), which allows you to use Perception Neuron with HTC Vive. It has some nice features like automatic yaw drift correction. Furthermore, you can also use Kinect and other sensors together with the Perception Neuron, as long as Vive is set as the "master coordinate system".
Check out the READMENeuronTest.txt file that comes with the project for more details.
Update regarding RUIS Forum
I also want to thank Dev for pointing out a problem with the RUIS Forum registration, which I have now fixed. Consequently, the forum registration works again!