Installing Markdown as an OS X Services Menu Item Using Automator | Gothick.org.uk
Matt Gibson:
I just had a quick look around the web for ways to install Markdown translation as a Service (i.e. available from the Services menu) on my Mac. Most of the hits I got seemed to be quite old, and involved hacking about with an existing service for another text converter.
So, I experimented. And the good news is that since Snow Leopard came out, with its improvements to the Services menu and Automator support, adding Markdown conversion to the Services menu yourself is an absolute doddle. I took a guess and what I did worked first time.
This is a great little post on how to add a Markdown service to Lion - great for those who write in Markdown and need their text to be converted to HTML.