While looking at globalspecies.org's webserver access log, I thought it would be interesting to see how the users were navigating the website. After not finding a free solution written in PHP, I decided to write my own.
If you have ever looked at a webserver access log file, you know that it is cluttered with search bot requests and ancillary file requests for images, etc.
AWSTATS would seem like the perfect place to generate a click track report. It already reads the log file, identifies robots and user sessions to generate a traffic report. I would have considered writing an AWSTATS plug-in if it were written in PHP, it was written in PERL instead.
I was able to use the AWSTATS robots file, with minor changes, to identify robots.
Click Tracker creates a simple html page showing user navigation thru a website.
The source code is available here.