Primarily CPM Based Ad Networks
* 121Media
* 24/7 RealMedia
* Accelerator-Media
* AdAgency1
* AdBonus
* AdDynamix / Pennyweb Networks
* AdOrigin
* AdPepper
* AdSmart
* Adtegrity
* AdZuba
* Ampira Media
* Bannerconnect
* BannerSpace
* BlueLithium
* BURST! Media
* Casale Media
* Claxon Media
* Click Agents
* ClickBooth
* CPX Interactive (Formerly Buds Media)
* EuroClick
* Experclick
* FastClick/ValueClick
* Federated Media
* Gold Group
* Gorilla Nation Media
* Hurricane Digital Media
* Impression|Up
* InterClick
* Interevco (Interactive Revenue Company Ltd.)
* Joetec
* Mamma Media / FocusIn
* MaxOnline
* Oridian
* Premium Network
* Quake Marketing
* Quin Street
* RealCastMedia
* RealTechNetwork
* Revenue.net
* Right Media
* Rydium
* The Robert Sherman Company
* TMP
* Tribal Fusion
* Valuead.com
* Yes Advertising
Primarily CPA/CPL Ad Networks
* Advertising.com
* Axill
* Azoogle Ads
* ClickBank
* ClickXChange
* Commission Junction / BeFree
* CoverClicks
* DarkBlue
* DrivePM
* emarketmakers
* Linkshare
* Maxbounty
* Meta Reward
* ProfitCenter
* Revenue.Net
* ShareASale
* Strategic Affiliates
* WebSponsors
Primarily CPC AND/OR Text Based/Contextual Ad Networks
* Yahoo! Publisher Network
* AdForce
* AdHearUs
* AdKnowledge
* Affiliate Sensor
* All Clicks
* AllFeeds
* BannerBoxes
* BClick
* BidClix
More to come....