Ghostscript is the well-known PostScript interpreter which is
available for all common and most esoteric platforms and supports
many different printers, file formats and some displays.
Flavors:
a4 - Set page size to A4 by default (instead of letter)
gtk - Build with Gtk+ support
no_x11 - Build without X support
WWW: http://www.cs.wisc.edu/~ghost/