We don't have a download link yet, but you can find it using Google.
Review
SketchUp Viewer is developed by @Last Software, Inc. and is used by 111 users of Software Informer. The most popular versions of this product among our users are: 4.0 and 5.0. The name of the program executable file is Viewer.exe. Works with skp file type. The product will soon be reviewed by our informers.
