Tgex is a library to support game development with XNA. It mainly consist of a module and attribute management, so that the actual game can be coded by an xml description file.
I will write about it in detail and give examples later.
It also manages rendering to support 3D stereoscopic output. Supported are passive stereo like you use with two projectors, and line-interlaced stereo for special 3D monitors or red/green (anaglyph) stereo on any monitor. Support for field-interlaced stereo like used by head-mounted-displays will be added soon.