I wanted a way to get a quick snapshot of who had visited my web site in the last couple of hours and what they looked at. After putting in some new links, I wondered what path people were taking through my site and where they had come from. So I wrote this utility and have been using it and slowing adding to it ever since.
It basically lets you look at the last x number of lines from the web server's log and puts it into useable form. It assumes that each IP address identifies a separate person, which is not always correct, but for my purposes it's a safe bet. It then lists accesses sorted by individual and lets you see where people are going in your site.