VRML Plug-ins:
To view VRML files (.wrl extension) you need to download and install a VRML plugin, also known as a browser, player, viewer, client, or ActiveX control.

Windows:
Cosmo Player, Cortona, BS Contact VRML, blaxxun Contact, Octagon Player, OpenWorlds
Linux/Unix:
FreeWRL, OpenVRML / Lookat
Macintosh:
Cortona, CosmoPlayer, FreeWRL
PocketPC:
Pocket Cortona, Mobile 3D Viewer
(A PocketPC version of this detector is also available).

VRML links:
NIST
web3d.org