Geomview is an interactive 3D viewing program for Unix, including Linux, Mac OS X, and Cygwin under WIndows. Geomview lets you view and manipulate three- and higher-dimensional objects, and can also be used as a display engine by its modules and other programs (such as SaVi, also on SourceForge) to animate objects. Geomview supports OpenGL and uses a Motif X interface.
Some known issues with Geomview are noted.