Open-source implementation of Markdown for Javascript

MarkdownDeep is an open-source (read license) implementation of the increasingly popular web publishing syntax Markdown. MarkdownDeep provides a high performance implementation for ASP.NET web-servers along with a compatible JavaScript implementation for client side use.

http://www.toptensoftware.com/markdowndeep/
http://www.toptensoftware.com/markdowndeep/dingus