Executables for most of the games on the Open Inventor Games CD are available through this link.
Visit the Inventor anonymous ftp directory for 3D models, file translators, images, etc., for both Open Inventor and IRIS Inventor.
See the README files in those directories for information on what is available.
Ez3d modeler from Radiance Software is a new low-cost 3D modeling and raytracing system for the SGI platform. At an entry-level price, Ez3d provides high-end features like spline surface modeling, 3D beveled text, layered texture/bump mapping, and import/export to DXF, Inventor etc. It has an intuitive graphical interface designed for the artist and engineer.
A free demo version of Ez3d is available via anonymous ftp.