ZIP Stat
Advanced web counter from the 2000's - not actively developed.
Repository moved to https://github.com/simonmikkelsen/zipstat . Old code history is only here on SourceForge.
Year 2000 style full featured website statistics service, witch can be used to register almost anything posible about a websites visitors.
Now only security bugs and support of new browsers have been addressed.
Getting a modern system will require a rewrite today, so this project will stay in maintenance mode. It still works fine and everybody are welcome to fork it or contribute.