Gleez is an open source, extensible Content Management System that is built on the Kohana Framework. Gleez is the fusion of many good concepts from the 4 most popular CMS: Joomla, Drupal, Wordpress and Ruby Rails. With years of experience using these, we've gathered great ideas and in some cases, improved on them.
Gleez CMS is licensed under a Gleez CMS License, so you can legally use it for any kind of open source, commercial, or personal project.
But creating this CMS quickly would have been nearly impossible without its foundational framework - Kohana 3.