Aardvark Topsites PHP is a free topsites script built on PHP and MySQL. A topsites list ranks a group of related sites by popularity. Webmasters join the topsites list and are given a button to put on their site and link back to the topsites list.
Members ranks can be shown on their button.
New: Stat Buttons, allowing you to customize your buttons and display all kinds of stats on them
6 different ranking methods
Counts unique pageviews, total pageviews, unique hits in, total hits in, unique hits out, and total hits out
New: Rank daily, weekly, or monthly
Fully customizeable skins: make your topsites look however you want!