The package contain a set of cgi scripts which maintain statistics for your web site. They also provide a nice counter, which you can sport on your web page. These scripts don't require any help from web server.
Probe is a website-usage analysis tool. It 'probes' (logs) certain pages being viewed by a visitor, without needing access to log-files from the web-server and produces a web-page with statistics using bargraphs.
Qbanner is a Perl+Mysql Ad-Server (GIF, JPEG, PNG ads). Graphical,tabular hourly (daily,monthly) stats, cache busting. Help is needed to debugging,port to mod_perl other (transactional)Db, adding new media types, distribuited servers.