phpAdsNew is an open-source ad server, with an integrated banner management interface and tracking system for gathering statistics. With phpAdsNew you can easily rotate paid banners and your own in-house advertisements. You can even integrate banners from third party advertising companies.

 バナー管理、トラッキング、統計情報閲覧などが可能なオープンソースのphp広告管理システム。
デザインもなかなかいい感じです。