a2ps: Any to PostScript filter. Of course it processes plain text files, but
a2ps: also pretty prints quite a few popular languages.
a2ps: 
a2ps: More detailed web pages about GNU a2ps, including documentation, flashes,
a2ps: updates, mailing lists, FAQ etc.,
a2ps: is available at http://www.inf.enst.fr/~demaille/a2ps.
a2ps: