ServerZen can provide CMS solutions to suit any need. We have successfully deployed intranets, web portals and CMS-based web applications with Plone and Mezzanine.
Plone is an open source Content Management System (CMS) built on top of Zope and CMF.http://plone.org/documentation/faq/what-is-plone
Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework, Mezzanine provides a simple yet highly extensible architecture that encourages diving in and hacking on the code. Mezzanine is BSD licensed and supported by a diverse and active community.http://mezzanine.jupo.org/