http://www.w3perl.com/ is a free logfile analyzer
Web analytic tool for Web / FTP / Squid / CUPS and Mail servers.
It can use server’s logfiles or your own (page tagging or counter)
The perl scripts analyze logfiles and produce HTML/PDF reports.
W3Perl can be run from the command line or from the web interface.
http://www.w3perl.com/ is an open source analytics application that doesn’t require any code to be inserted into websites for monitoring.
Rather, it goes through the log files generated on the server-side and creates the reports in real-time.
The application is not limited to web servers and it can also render the logs of FTP, Squid, CUPS and mail servers.
W3Perl stores the data for a period configured and can display statistics from hours to years.
It can provide information on many details about the visitors like their countries, browsers, screen sizes and pages they browsed, the amount of traffic created and much more.