I am currently playing with RevSense. Unfortunately the source website seems have to been sucked into a black hole (www.revsense.com)
and is no longer available.
However, I was lucky enough to get the code just in time and am now hacking it for Oscommerce. The biggest BugBear so far is that
Revsense is written into a template that runs a little like Smarty etc. I really dont like that! it makes coding or reverse
coding so much harder, so my ploy is to remove the template and re-assemble the pieces back to simple html&php pages.
You can see by the output examples on THIS=>CURRENT_PAGE
The new pages are here: http://www.bluegreenenterprises.com/revsense/NEW_index.php