Koala Framework 
http://www.koala-framework.org/
open source framework for web applications and websites
Powered by Php, Zend Framework, ExtJS and MySQL.
Application Framework
Build desktop like web applications with the power of Zend Framework and ExtJS - and
Koala Framework as glue that makes writing smart applications as easy as possible.
CMS
Koala Framework CMS makes building websites fun. Use and combine the components shipped
with Koala and just concentrate on the design and layout of your website - you will
get a AJAX based, easy to use backend for free.