instant-markdown-d is a small Node.js server that enables instant compilation and previewing of Markup files. A plugin can easily be written for any text editor to interface with it. One currently exists for VIm: https://github.com/suan/vim-instant-markdown
[sudo] gem install redcarpet pygments.rb
[sudo] npm -g install instant-markdown-d
|Action||HTTP Method||Request URL||Request Body|
|Refresh Markdown on page||PUT||http://localhost:<port>||<New Markdown file contents>|
<port> is 8090
Aaron Lampros's Docter, which is the underlying Markdown converter and styler.