Mamboserver.com - Home
This is probably the best CMS (Content Management System) around. I'm sure you can argue with this statement, however, Mambo is very powerful, easy to learn and very easy to configure. It can be nicely put together with other Web systems (like phpBB for forums, or Coppermine for picture gallery). It has a nice support community, wide spectrum of addons and modifications (inluding internalization) and can be deployed very fast. What else is there to ask for?