Plone / Zope CMS tool   (link)

http://plone.org/
Plone is an open source Enterprise Content Management System (CMS) that runs on top of Zope and CMF.

CMF stands for Content Management Framework. A CMF is a web content publishing and management system that allows normal content originators to create, submit, and publish their content directly within a web application/site without any development tools or knowledge of HTML.