serve 200 billion+ ads a month (not typo) turn your site into a revenue generator.  Channels inc: Travel, Tech, Cars, Finance, Women's, ABC1 Men, BtoB, Geo-targeting +  more! 24/7 Real Media  

'96 AdManager helps publishers. Licensed or hosted higher CPMs + less unsold inventory. Accipiter

'06 for contextual adverts AdBrite

places advertising on own network of premium branded websites in b2b, ethnic, recruitment, shopping & sports.  Earn premium amounts from the sale of ad inventory or a minimum g'teed rate AdJug
estd '00. serve 600m ads pm to 200+ UK publishers, hi vol brand name sites to good qual small niche market sites. maximise revenues from unsold inventory or a g'teed monthly revenue stream. AdViva 

own Affili.net and SEDO Domain Parking. AdLINKTARGET is a unique network of 3000 sites access 75m+ internet users pm across Europe also includes 10 affinity categories. AdLINK

BidClix

IonSearch bid management tool designed with an easy-to-use interface so online marketers can easily select the exact tools, strategies & interfaces they need for precision, flexibility & control.  Bluestreak

couple of years, contextual advertising Clicksor 

monitor your competitors' internet advertising. view ads from 1,000+ websites in 25 markets worldwide. e-Netwatch

sell anything on ebay, trading since 1995 - get others to sign up too and earn from them eBay

Kanoodle

Mirage

Miva

Nixxie

couple of years, contextual advertising Oxado Contextual Ads

advertising monitoring service captures pretty much every advertisement run in the UK in every medium – TV, press, direct mail, door drop, internet, outdoor, radio and cinema. available 24/7  365 days a year. Thomson Intermedia

TroutMedia

VibrantMedia