Ad management system

Hi all, I think this is a repeated question but I need to get the best out of it. I am looking for an open source Ad management system, like PHPAds but includes advanced targeting capabilities and advanced features like setting a frequency cap on the number of impressions each visitors views for each Ad, entering image series, allowing rich media ads, and allowing to host many sites and many advertisers while only supplying a simple tag to the sites to host the ads, in brief something like DART of doubleclick or Adforce, of course I will not find all their feature for free, but anything even near them out there ? Thanks Ahmed