Makers of StereoEyes glasses, which use shutters to alternate between eyes for stereo effects. Shutters are controlled by IR transmitter at computer. Allows multiple viewers. http://www.stereographics.com/
VRex specializes in stereoscopic imaging and display products, including projection panels, projectors, video cameras, as well as various hardware and software utilities. http://www.vrex.com/
Provides the HiBall Wide Area, 6DOF Optical Tracker and the DeltaSphere 3D Laser Scene Digitizer capable of room size digitizing. http://www.3rdtech.com/
Provides an affordable, high-end, projection-based VR system called the VisBox. Also available for custom hardware and software development. http://www.visbox.com