As a web master(or blogger), we need to know the details of everyday’s visitors. In some caese, we use third-party service, such as Google Analytics, which is very powerful, sometimes we don’t want give the information of our own site to third party, so we need to store the data in our own server. Among the indepent softwares, Piwik is the best one.

Piwik is based on PHP+mysql, if you need to keep your information secret, and need service like Google Analytics, you can try Piwik.