CubicVR is a 3D Engine, also working under Dreamcast and Playstation Portable. If you are into 3D coding, you might want to check CubicVR out!

CubicVR Dreamcast (23-06-2011)
CubicVR PSP (24-06-2011)

Thanks to http://www.dreamcast.es/news.php?readmore=464 for the news.

https://github.com/cjcliffe/CubicVR