Mojomojo is a Catalyst and DBIx::Class -powered content management system that borrows many concepts from wikis and blogs. It allows you to maintain a full tree-structure of pages, and to interlink them in various ways. It has full version support, so you can always go back to a previous version and see what's changed with an easy AJAX-based diff system. There are also a bunch of other features like a live AJAX preview while editing, automatic attachment galleries, RSS feeds for every wiki page, page permissions editor.
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.