mdtopdf
requires wkhtmltopdf
This is a simple utility (distributed trough gem) to convert markdown into pdf.
It basically, opens a file for reading, renders its html trough redcarpet and then converts into pdf with pdfkit.
I might extend it sometime so you can provide and external CSS,
i guess if you really need it you could implement yourself.
Installation:
gem install mdtopdf
Usage:
mdtopdf <file>
this will generate file.pdf in the same directory.
Heres a kitten:
(also helpful for testing the application)