There are several fine 3D plugins available. Here are some that we like:
	Bit Management BS Contact BS Contact is an excellent all around viewer and is well suited to our city models. Platforms - Windows, Mac 3D File Types Supported - VRML, X3D, MPEG4 Download Here
	Blaxxun Contact Contact is an excellent all around viewer and includes a multi-user version. Platforms - Windows, Mac 3D File Types Supported - VRML, X3D Download Here
	Media Machines iScene (formerly Flux) iScene is a great object and small scene viewer with advanced graphics capabilities. Platforms - Windows 3D File Types Supported - VRML, X3D Download Here
	Parallel Graphics Cortona Cortona is a great object and small scene viewer and it includes nifty drag and drop capability. Platforms - Windows, Mac 3D File Types Supported - VRML Download Here
	Yumetech XJ3D XJ3D is a Java based viewer well suited to our city models and military applications. Platforms - Windows, Mac, Linux 3D File Types Supported - VRML, X3D Download Here