NVSG, the NVIDIA Scene Graph, has just been updated with better tracking, occlusion culling, and an updated "VisSim" complete sample application.
URL: http://developer.nvidia.com/object/nvsg_home.html.
The NVIDIA Scene Graph Software Development Kit (NVSG SDK) is an object-oriented programming library for creating scene graph-based applications -- the NVSG is built from the ground up for modern computer systems, rather than as a hacked reqorking of 1980's workstation code. It supports CgFX, volume rendering, and is packaged with multiple usage samples.
Posted on 07/29/2008