Count+Stat
Count+Stat provides the power, and expansibility of a high priced statistics program. This solid running perl script tells you important user information such as IP numbers, refers, clients, and time. With Count+Stat you can see where your users are coming from, and thus you can tell what they like, and overall who they are. If you get all kinds of people from a certain website, you can visit it and see exactly where your users come from!