Version 5.0 of the NVIDIA Scene Graph SDK (NVSG) has been released and is available at: http://developer.nvidia.com/object/nvsg_home.html
Version 2.2 of the Cg Toolkit has been released and is available at: http://developer.nvidia.com/object/cg_toolkit.html
NVSG is a royalty free, high performance OpenGL scene graph with robust CgFX support for maximum interactive realism. Version 5 increases performance substantially while adding support for MetaSL shaders, 10-bit color display, enhanced stencil buffer support, and multi-GPU scene distribution for handling massive interactive scenes (up to 32 GB).
Cg 2.2 adds a “latest” compiling option to easily leverage the latest GPU capabilities and performance, support for geometry programs with DirectX10 and GLSL translation profiles, improved HLSL compatibility, and 15 new APIs for new capabilities and added flexibility.