Kevin: A list of open-source and closed-source content-management systems. The list has a cursory look at strengths and weaknesses of the systems. Open-source systems WordPress and Drupal are given good reviews, especially on the strength of their development communities. Expression Engine is one of the closed-source options that is given good marks. For those looking to create their own social news networks ala Digg, check out Pligg. It's useful as a basic comparison of various options out there.