Geomview is an interactive 3D viewing program for Unix. It lets you view and
manipulate 3D objects: you use the mouse to rotate, translate, zoom in and out,
etc. It can be used as a standalone viewer for static objects or as a display
engine for other programs which produce dynamically changing geometry. It can
display objects described in a variety of file formats. It comes with a wide
selection of example objects, and you can create your own objects too.