DocPad
Empower your website frontends with layouts and meta-data
...Completely file based, meaning there are no pesky databases that need to be installed, and for version control you get to use systems like Git and SVN, which you're already used to. Write your documents in any language, markup, templating engine, or pre-processor you wish (we're truly agnostic thanks to your plugin system). You can even mix and match them when needed by combining their extensions in a rails-like fashion.