Ruby, Rails, content

Marti is a markdown articles rails engine (yes, another one). It's quite simple to use and it's the one I use on this site. Articles are placed in a given directory and meta information can be attached to the articles by simply adding it to the top of the file. They can be cached using a supplied caching engine and are ordered by the last updated timestamp on the file (or an overridden supplied last_updated_at value).