Jaws Project
http://jaws-project.com

Jaws is a Framework and Content Management System for building dynamic web 
sites. 

It aims to be User Friendly giving ease of use and lots of ways to customize 
web sites, but at the same time is Developer Friendly, it offers a simple and 
powerful framework to hack your own modules. Jaws is Free Software under the 
LGPL for core parts and GPL for the rest.