There are lots of CMS systems out there, and several of them don’t cost anything (Unlike most things in life, most of the free ones are actually pretty good) Choose which one to used based on the website you need. This does not list them all. There are a great number of very good Content Management Systems out there from which to choose. Look at the author’s websites to make certain that the CMS you opt for is right for your requirements.
Joomla can be used for many things. You can use it for almost any kind of website. Personal websites, business websites for the small business or large corporation, online publications, and e-commerce. (Note that if you intend to use any CMS for an e-commerce operation, choose a package specifically designed with e-commerce needs in mind, such as Zen Cart or osCommerce.) Simple to install, Joomla’s setup process can be completely automated if your web host has installed Fantastico.
PHP-based Website Baker affords a lot of design simplicity. Since it is PHP based, you have the ability to play with the page to make it look like what you want if either you are fairly competent with PHP or if you want to pay a PHP programmer (which might turn out to be less expensive and easier than you might think — check out guru.com). There are a lot of add-ons that can be installed on a Website Baker site including, for example, photo albums, a message board, a catalog, an online payment option, etc.
Drupal. Avoid Drupal unless you are an expert or have special training in how to use it. They even confess on their web page that it takes a while to learn the program.
Mambo is very versatile, easy to use, and popular. You can obtain a number of themes from which you can create a good website with only minor changes.
phpWebSite is great and can be used for many things. A document manager, calendar, form generator, polling system and photo album are all available as add-ons. As is the case with the acquisition of all new information, Content Management Systems involve a specific learning curve. Some PHP knowledge is required in order to do most customizing.