PHP-Nuke is a simple, yet fully featured Content Management System to enable webmasters to quickly deploy a dynamic websites with minimal hassle.
Really easy to install, setup and had my site up and running very quickly.
The easiest and the simplest content management system out there. There are hundreds of free add-ons. You can create a complete web solution, whatever type of web site you have in mind, within few minutes. Lots of free support available too.