A better markdown

I don’t even recall what I was looking for but I came across Maruku which is a library that implements the Markdown syntax, the PHP Markdown Extra syntax, and its own meta-data syntax. It should fix problems with underscores in links. It seems like the Markdown with SmartyPants module for Drupal also uses PHP Markdown Extra in its version for Drupal 6.0. That should be nice should I upgrade at some point. But I will start using Maruku on my Rails apps now and see what happens.