Stat Traq is a WordPress Plugin. So it can only be used with a WordPress blog. It doesn’t support multiple blog too. The plugin maintains a table of usage of the blog. After collecting all the data, the statistic and information can be view via a nice and rich interface.
StatTraq can be downloaded from
here. StatTraq also has a demo.
Note: StatTraq appears to be no longer maintained, developed nor still available for download.