Web Advertisement Server

Prominent Players:

1. AdSense (Publisher) for Feeds, search, mobile content & parked domains
   
2. Google Ad Manager (Advertiser)
   
3. DoubleClick - An ad management platform for publishers, advertisers, and agencies.
4. OpenX - An open-source ad-server released under the GPL license.
5. ADTECH - Part of the AOL Platform-A group of companies.
6. Hiro-media - Dedicated video ad server
7. Google Ad Manager - Google's Ad Server
8. Videoplaza - Dedicated video ad server
9. ZEDO provides internet ad serving to web publishers and direct marketers.
10. SmartPPC EVO - Ad serving software
11. AdBrite, Inc. is an online advertising firm
12. Google Analytics, AdBrite, Google Adwords, Microsoft adCenter, Yahoo! Search Marketing and the Apple iPhone.
13. SmartPPC EVO (Evolution) is a commercial ad serving software
14. from various XML feeds ( Miva, Abcsearch, 7Search, Marchex, SearchFeed, ValueClick, etc.)
15. from ad networks (Google AdSense, AdBrite, Yahoo! Publisher Network, etc.).