This module uses Pandoc to generate documents: http://johnmacfarlane.net/pandoc/

Note that Pandoc is released under GPL-2 or later, however according to the Free Software Foundation, I am indeed allowed to use it: http://www.fsf.org/licensing/licenses/gpl-faq.html#IfLibraryIsGPL since the 2-Clause BSD license that I'm using is GPL-compatible: http://www.fsf.org/licensing/licenses/index_html#GPLCompatibleLicenses (search for FreeBSD License, which is another name for it).