I am currently testing Drupal, a very mature and flexible content management system. Drupal is currently available in the stable version 6.19, which should be used for production systems. Drupal 7, which is currently in beta 3, brings a lot of new features and is definitely worth a test.
In preparation for moving my websites to Drupal, I had already installed some Drupal 6.x test systems on my 1&1 (German Internet Provider) dedicated managed server. The installation is not quite trivial on their servers, but you can find some good tutorials for Drupal 6 on the web. Yesterday I tried to install Drupal 7 on my server and I was about to despair if I had not found the following tip related to Piwik, a PHP web analysis software.