MultiMarkdown

The latest version of MultiMarkdown is available on github.

Go to the downloads page on github to find the latest versions of:

MultiMarkdown installer for Mac OS X
MMD support files installer for Mac OS X
QuickLook generator for MMD text files and for OPML files (NOTE: the QuickLook generator can cause a runaway process for some users, so user beware)
Mac OS X drag and drop applications for MMD
MultiMarkdown installer for Windows
latest source code to compile MMD yourself (e.g. for *nix)

If you are interested in the LaTeX features, you also download the LaTeX support files on github.

You can also download:

LaTeX support files — required for compiling the sample documents, and useful for your own documents
MultiMarkdown Test Suite for developers
A gallery of sample MultiMarkdown documents demonstrating various output formats and features
A MMD bundle for TextMate
A MMD export plug-in for OmniOutliner
The MMD support files for other programs