VR Juggler is a virtual platform for virtual reality application development created at the Virtual Reality Applications Center at Iowa State University. Applications developed in VR Juggler can transparently move between a wide range of VR systems.
osgJuggler is a library suite that makes developing computer graphics appications for virtual reality easier. osgJuggler is a framework that allows you to develop a scene with OpenSceneGraph and view it on any platform supported by VRJuggler.
VRVis is a programmer's toolkit for rapid development of Virtual Reality applications in the field of geospatial data visualization. It is based on VR Juggler and the Geospatial Data Abstraction Library (GDAL).