Get the Cosmos 2.1 VRML player here ==>

Sample 3D Objects
single file objects
File
size
Description
Calig476 kiBA building, single file
Chair.wrl11 kiBA simple chair
X29.wrl81kBAn Airplane
i_tower.wrl38kiB A simple effiel Tower
Window.wrl115kiB An Arch window
File
size
Description
Skeleton73 kiBA dancing skeleton
Chair.wrl11 kiBA simple chair
X29.wrl81kBAn Airplane
i_tower.wrl38kiB A simple effiel Tower
Window.wrl115kiB An Arch window

VRML files, are purely text and all effort goes into the player.
  Shapes are drawn using co-ordinates, so are hard to hack at
  But you easily fool about light sources and viewpoints. 
  (Check out moving viewpoints on the skeleton above)
Apparntily you can convert AutoCAD DXG files to VRML files..DXF2VRML for MAC


3D Live Pictures
Dublin 3D Live pictures
Get plugins here