A simple little web app that will show you what your markdown and other template engine files look like as html.
Run it from a directory, then point a browser at
http://localhost:9292/ for a
list of suitable files in that directory, or directly to a file in that
http://localhost:9292/my_file.md to see
my_file.md as html.
Requires rack, tilt and any gems needed for the template language you're using.