BSCounter - A web hit counter/tracker written in Perl.
Counter Lite - Counts both unique visits and page views. [Freeware]
Traffic Log - Enables you to track hits and unique visitors, hits by page, by date, browser and captures the entry page for each visitor.
Unicounter - A Perl script that can count page-hits or downloads. It is may be used with javascript or server-side-includes and can track IP addresses to eliminate false increments. [Freeware]
WebAnalyser.NET - Web based multifunctional tool for real time website monitoring and traffic analyses. [Commercial]