Postscript Viewer is a free program that makes it easier to view Postscript files in Windows. After installing the program, icons for Postscript files change to PDF icons and double-clicking launches your PDF viewer in which the Postscript file appears.
Rampant Logic Postscript Viewer is based on Ghostscript 9.07, which is licensed under the AGPL. However, since it is distributed as an aggregate with the unmodified Ghostscript binary, Rampant Logic Postscript Viewer itself is not bound by the AGPL (see Ghostscript Distribution Notes and GPL in Proprietary Systems).
Security Update: The latest version of Postscript Viewer is 1.2. If you are running an older version, please upgrade now for the latest security patches.