phpMyVisites is a free and powerful open source (GNU/GPL) application for websites statistics and audience measurements.

An interesting feature of phpMyVisites Version 2 is that you can receive to your site stats through email and RSS.

Screenshots of Reports generated by phpMyVisites. You can also take a look at the demo hosted at: http://www.phpmyvisites.net/phpmv2/

phpMyVisites | Free Web Analytics, web statistics