Discount (For Ruby)
Discount is a implementation of John Gruber’s Markdown markup language in C. It implements all of the language as described in <daringfireball.net/projects/markdown/syntax> and passes the Markdown test suite at <daringfireball.net/projects/downloads/MarkdownTest_1.0.zip>
Discount was developed by David Loren Parsons <www.pell.portland.or.us/~orc>. The Ruby extension was developed by Ryan Tomayko <tomayko.com/>.
Discount is free software; it is released under a BSD-style license that allows you to do as you wish with it as long as you don’t attempt to claim it as your own work. The Ruby Discount extension adopts Discount’s license verbatim. See the file COPYING for more information.