Grav : Grav is a modern open source flat-file CMS written in PHP
GetSimple CMS : GetSimple is an XML based, stand-a-alone, fully independant and lite Content Management System.
drupal.org : Drupal is an open source content management platform powering millions of websites and applications. It’s built, used, and supported by an active and ...
Bolt : Bolt is a tool for Content Management, which strives to be as simple and straightforward as possible. It is quick to set up, easy to configure, uses e...