When it comes to content management our weapon of choice is definitely Joomla! While we deem it fairly intuitive (as far as content management systems go) there will undoubtedly be times when you are stuck on something once you have taken over the maintenance of your own site. Of course, we are usually available to answer questions but we strongly suggest you download and/or review some of the available Joomla! documentation, as well as sign up for the official Joomla! forum.
JOOMLA! 2.5 and 3.x (Current)