PHP-Nuke
PHP-Nuke is a free content management system, which is relatively difficult to install and involves a tedious learning curve. I spent the day investigating it in depth and eventually minimalised it to avoid unnecessary clutter a la Slashdot. The package was constructed by geeks and was intended for an audience of geeks.
My favourite example site is associated with Enemy Territory as I was badly addicted to the game (photographics evidence). PHP-Nuke is by far more sophisticated and complex than WordPress, for example,and I would rate it 9 out of 10.
The site I currently work on is titled The Computer Vision Digest. Also see: