Ask HN: Can you guys recommend a good script to manage ad inventory?

I want a script that can manage regular banner ads (skyscrapers, squares, etc.) of many different dimensions and sizes (mainly clickable images).

I would like to be able to track the clicks and generate reports. I would prefer if the script is something I can install on the server, and open source is best. PHP or Ruby, preferred.

Thanks.

P.S. If it can do other stuff that normal ad inventory management software should be able to do, that would be awesome.