The CPAN has you

[A. Pagaltzis]

Hi John et al,

just a heads-up that someone finally made good on the threat to
wrap up Markdown and put it on the CPAN:

<http://search.cpan.org/dist/Text-Markdown/>

And the first other guy to make good of that wasn’t far behind:

<http://search.cpan.org/dist/Template-Plugin-Markdown/>

Regards,
-- 
Aristotle Pagaltzis // <http://plasmasturm.org/>