3D Compression
3d compression compress
http://3dcompress.com/web/index.htm
Actify Spinfire
The next dimension in digital design communications - www.actify.com
http://www.actify.com/
ModelPress Reader
Free modelpress software is a 3d model publishing and viewing system that solves the problems associated with distributing native format 3d cad models over web technologies or networks to personnel that do not have access to the original files.
http://www.modelpress.com/viewer.htm
SolidView
Solidview is the only 3d and 2d view and markup program for all popular cad systems that provides a free viewer for sharing design data with everyone
http://www.solidview.com/