Information Week has a done a nice short review on CMSes (Content Management Systems). People have been using CMSes for document management to web site construction. They are powerful tools to accomplish most anything because they combine the power of a database with the design skills of a fairly good web designer. The user needs very little expertise to make the system work.
There are many CMS systems and they don't do the same exact things. So, if you are clear as to what you want, the number of choices often goes down to a handful from that of dozens. The review is a good one but a few important CMSes were left off the. Read the comments to get a fuller picture.