If you've ever searched for a way to view postscript (.ps) files, you've probably come across the default answer of "Ghostscript," a free but user unfriendly command-line app. There's a much easier way. GSView is a GUI front end that hides all the details of Ghostscript. Once both programs are installed, you can view .ps files just by double-clicking.

Install http://www.cs.wisc.edu/~ghost/doc/AFPL/get851.htm

Install http://www.cs.wisc.edu/~ghost/gsview/get47.htm

Double-click the file. Done.

GSView costs $29.55USD or $40ASD and is well worth the price. I registered mine within an hour of installing.