Picomarkdown
This is a trimmed-down version of Micromarkdown.js.
It is smaller, and doesn't support the AJAX/include or tables functionalities.
Demo
Here's a simple JSFiddle demo of the parser:
Picomarkdown Demo
About
License: MIT
Version: 0.1.0
Date: 10.2014
Usage
Adjust to suit your preferred module format.
var md = ; var html = md;console;
Credits
All credit for Picomarkdown goes to the author of Micromarkdown.js, on which this library is shamelessly based: Simon Waldherr.