Babelmark is a testbed for side-by-side comparaisons of the output of various Markdown implementations.
First Markdown implementation by Markdown's creator, John Gruber. Written in Perl.
PHP port of Markdown.pl by Michel Fortin. PHP Markdown second flavor, “Extra”, adds some new language constructs.
Python implementation of Markdown mostly by Yuri Takhteyev and Manfred Stienstra.
Perl module based on MultiMarkdown but stripped from the features not present the original Markdown.
Perl module for MultiMarkdown.
A derivative of the original Markdown.pl with added features by Fletcher T. Penney.
JavaScript port of Markdown.pl, by John Fraser.
Babelmark
Copyright © 2008 by Michel Fortin
Based on the Markdown Dingus
Copyright © 2004 by John Gruber