Swap Stylesheets
I created this for fun but would never consider using a style switcher on any serious site. Coming up with one really good design is hard enough but to come up with many, would be next to impossible to say the least and it certainly wouldn't be any help in increasing brand recognition.
The script uses a combination of Javascript (for speed) and PHP (for redundancy). It works fine when the user has Javascript disabled. The default stylesheet is changed on a click of one of the above links. All stylesheets are also available through the browser menus (if you are using a serious browser that is).
Download the script (PHP, 2.6 kB)