recommendation for offline Markdown renderer (for GitHub .md)?

[Zenaan Harkness]

Anyone got a strong recommendation for an offline Markdown renderer which can at least do a passable job rendering GitHub's .md style?

grip uses GitHub API, contacts the server on every render, seems to not even cache CSS files...

Also!:

GitHub supports inlining section files (very useful for reducing file size/ dividing one large file) with this:

<file name="section_2.md">

So having that work with an offline renderer would be gold™...