AWStats is a free powerful and featureful server logfile analyzer that shows you all your Web/Mail/FTP statistics including visits, unique visitors, pages, hits, rush hours, os, browsers, search engines, keywords, robots visits, broken links and more
Vistigator is a website analyzer, which allows CEO's, CTO's, and users to view info about their website. Vistigator is integrated with Apache 2 HTTP Server, allowing Vistigator to display website stats graphically & easily about specific IP Addresses.
Php LogAnalyzer (aka PLA) is a Log Analysis tool for Apache. There are lots of loganalyzer softwares available on the internet but most of them have their own data storage ways. PLA is a tool to analyze log files and store results into MySQL databases.