The ABC list of advertising Networks

Advertising is the backbone of websites and allows webmasters to generate revenue through various advertising methods. Finding the right advertising network to use on your site is essential.

With the help of other webmasters I've spent some time compiling a reasonbly comprehensive list of most of the major advertising networks. Below you will find a list of advertising networks offering CPC, CPM and CPA campaigns. These networks are listed according to their major advertising methods, and their position doesn't reflect quality or payout.

This list is by no means a comprehensive list of all the advertising and affilliate networks out there, but it should provide you with a good starting point to see which of the networks will work the best for your site.

CPC:
Cost per click - the cost or cost-equivalent paid per click-through. You get paid each time a visitor clicks on one of your advertisements. The revenue generated from the click will vary according the maximum bid of the advertiser or ad network.
Google Adsense
Yahoo Publisher Network (Beta)
Chitika
BidClix
BannerBoxes
Adbrite
AdSonar
Clicksor

CPM:
Cost per thousand impressions. You get paid a certain amount each time a visitor views one of your pages. CPM is indicated as a certain payout for a 1000 impressions. If an ad campaign has a eCPM of $1.00 you will get paid $1.00 for every 1000 impressions.
Tribal Fusion
FastClick
Casale Media
BurstMedia
RealTechNetwork
ValueClick
Buds Ad Network
MaxOnline
24/7 Real Media
Bannerconnect
Mamma Media Solutions
Adtegrity
Ad pepper Media
Rightmedia.com
Advertising.com
Accelerator Media
AdSmart
AdAgency1
Interclick

CPA/CPL
Cost per Action - model in which payment is based solely on qualifying actions such as sales or registrations. Your visitors must complete a certain action after clicking on the ad. This varies from buying a product or registering for newsletters.
Linkshare
Commission Junction
ShareASale
WebSponsors
Advertising.com
Azoogle Ads
Maxbounty