Wusage
Wusage is a statistics program that helps you determine the true impact of your web server. By measuring the popularity of your documents, as well as identifying the sites that access your server most often, wusage provides valuable marketing information. By determining the paths your users follow and analyzing the sites from which they come, Wusage helps you find out which outside sites are most important to you. Practically all organizations, whether commercial or educational or nonprofit, need solid numbers to make credible claims about the World Wide Web. Wusage fills that need. Wusage is written in 100% highly-optimized C.