I’ve created a WordPress plugin that uses Parsedown as a Markdown processor. I actually finished version 0.1 a few weeks ago, but I wanted to iron a few bugs out before I announced it publicly.
It functions as a 100% drop-in replacement for the original Markdown plugin, PHP Markdown Extra by Michel Fortin. Everything is the same, down to the same filter behaviors and priorities.
Unlike other plugins, my plugin has no settings. Just upload the plugin, activate it, and you’re off.
If you’re looking for a live example, this site is currently using the latest version.