We've been discussing this topic some in another thread already (http://forum.zdoom.org/viewtopic.php?f=4&t=33910&start=75#p716166), but this topic really belongs here, on the Projects board.
I created a mod of gzdoom that supports Oculus Rift, and other stereoscopic 3D modes. Check it out:
http://rotatingpenguin.com/gz3doom/
(Download, source code, documentation etc.)