Noesis (3D Model Viewer)
http://oasis.xentax.com/index.php?content=downloads
This is a copy of the zip from that page, version 3.41, in case it should ever disappear from the Senor's site.
Version 4.0874 - https://www.dropbox.com/s/71xbpmze4cj9t5w/noesisv40847.zip
This is a stub page. I haven't used this yet, but DP and Mike have and might have tips or notes for future use.