Open source PHP CMS for PHP WAX.
An open source PHP CMS that I've been helping to build for several years now. Starting back in 2006 it has come a long way since then and is currently on version 7.
The CMS itself runs on top of a PHP MVC framework called PHP-Wax, which I also help to develop.
There is an ever growing list of plugins to help do the more standard and mundane tasks like archive navigation, meta details, sitemaps & RSS feeds
Wildfire is currently on version 7.1