http://www.edcenter.sdsu.edu/repository/Mbcw/download.html
 
Downloads*
Platforms Supported
Viewer Kinemage
Protein Science
UNIX, Macintosh, Windows
Viewer Chime 1.0
MDLI
UNIX (SGI), Macinitosh, Windows
Viewer Chime 2.0 Beta
MDLI
Windows (95/NT)
Viewer Rasmol
Roger Sayle 
Glaxo Wellcome
UNIX, Macinitosh, Windows
Browser Navigator 3.x
Communicator 4.x
Netscape
UNIX, Macintosh, Windows
Browser Explorer 3.x
Explorer 4.x
Microsoft
UNIX (DEC), Macintosh, Windows
VRML Viewer CosmoPlayer 2.x
CosmoPlayer 1.x
SGI
2.x - Windows 95/NT (need Netscape 4.04)
1.x - UNIX(IRIX), Mac, Windows
VRML Viewer WorldView 2.x
Platinum
Macintosh, Windows(95/NT)
Utility PDB to VRML Converter
Horst Vollhardt
UNIX
Utility MOLDA
Higashi-Hiroshima
UNIX, Windows, Macintosh
 
* If there is no specific Operating Systems listed after the Platform you can safely assume it supports all Operating Systems. (eg."Windows (95/NT)" does not support 3.1)