DoubleClick
http://google.com/doubleclick

Google’s DoubleClick™ products provide ad management and ad serving solutions to companies that buy, create or sell online advertising. The world’s top marketers, publishers, ad networks and agencies use DoubleClick products as the foundation for their online advertising businesses. With deep expertise in ad serving, media planning, search management, rich media, video and mobile, our DoubleClick products help customers execute their digital media strategy more effectively.