Markdown converter
This package provides a simple block that converts Markdown text to HTML and outputs it. How it works:
After installation of this package you'll see a new block named Markdown Converter among the other blocks.
Navigate to any page of your web site to see this block in action - just add this block to any area and fill out the block's form.
The form has just one textarea field that should be filled with a Markdown text - it will be converted to HTML when you click Save.
This HTML will be shown on the page at block's place.
http://www.concrete5.org/marketplace/addons/markdown-converter/