Cafe Webmaster

There are lots of CMS/CRM on the web. But just some systems have good quality. Here is a list for beginners:

www.drupal.org
Big community, modules, flexibel, mature, more secure, easy to install, for advanced start you need to read docs, for big communities with different acces levels

www.joomla.com
Big community, modules, mature but there are some bugs, easy to install, easy to start, for small to middle websites

www.typo3.org
Bussiness class CMS, modules, flexibel, secure, hard to start and learn, you need to learn typoscript language

www.ez.no
Bussiness class CMS, modules, flexibel, secure, hard to start and learn

www.phphnuke.org
Easy to start and use, insecure, for small websites with big security risks