A helpful list of Ad Networks

Adsense from Google

1. Google Adsense : Grand-daddy of contextual advertising. (CPC)

Adsense Alternatives

1. Chitika : Shopping mall banner advertising. (CPC)
2. AdBrite : Ad marketplace for publishers and advertisers. (CPC); 75% payout.
3. Advertising.com : Large network. (CPA)
4. 24/7 RealMedia : Large network. (CPM)
5. Burst Media : Large network. (CPM)
6. Commission Junction : Large network. (CPA)
7. Kanoodle : Large network. (CPC); 50% payout.
8. LinkShare : Large network. (CPA)
9. ValueClick : Large network. (CPM)

Two Big Ones Coming Soon

1. Yahoo Publisher Network : Closed Beta (CPC)
2. MSN adCenter : Closed Beta (CPC)

A few more Advertising Networks

1. Accelerator Media :
2. AdAgency 1 : (CPM) ; 60% payout.
3. AdDynamix : (CPM)
4. AdEngage :
5. Adgenta :
6. Adhearus :
7. AdKnowledge : (CPC)
8. AdPepper : (CPM)
9. ADServing Network : (CPM)
10. Adsmart : (CPM)
11. Adtegrity : (CPM)
12. AdZuba : (CPM)
13. AffiliateFuture : (CPA)
14. AffiliateSensor :
15. AllFeeds : (CPC); 60% payout.
16. AVNads :
17. AzoogleAds : (CPA)
18. Banner Boxes : (CPC)
19. BannerConnect : (CPM)
20. BardzoMedia : (CPM)
21. BidClix : (CPC)
22. BidVertiser : (CPC)
23. BlinkAds : (CPA)
24. BlueFN : (CPA)
25. BlueLithium : (CPM)
26. Casale Media : (CPM); 70% payout.
27. ClickAdsDirect :
28. ClickBooth : (CPA)
29. ClickShare :
30. Clicksor : (CPC); upto 85% payout.
31. ClickXchange : (CPA)
32. ContexWeb : (CPC); 50% payout.
33. CoverClicks :
34. CPX Interactive/Budsinc : (CPM)
35. DirectNetworks : (CPA)
36. Enhance Interactive :
37. Esource Media : (CPM)
38. Etype-Europe : (CPM)
39. EtypeUSA :
40. ExpoActive :
41. FastClick=ValueClick : (CPM); upto 65% payout.
42. FluxAds : (CPA)
43. HurricaneDigitalMedia : (CPM); 60/75% payout.
44. Hyperbidder : (CPC)
45. IncentaClick : (CPA)
46. Industry Brains :
47. Interclick :
48. JoeTec : (CPM)
49. Kontera : (CPC)
50. Mamma Media Solutions : (CPC); 50% payout.
51. MaxBounty : (CPA)
52. Mirago :
53. MIVA AdRevenue Xpress :
54. Nixxie :
55. Oridian : (CPA)
56. Oxado : (CPC)
57. Paypopup : (CPM)
58. PeakClick :
59. PogAds : (CPC)
60. Popup Traffic : (CPM)
61. Quigo : (CPC)
62. RealCastMedia : (CPM)
63. RealTech Network : (CPM)
64. Revenue Pilot : (CPC); 60% payout.
65. RightMedia : (CPM)
66. Searchfeed : (CPC)
67. ShareAShare : (CPA)
68. TargetPoint : (CPC); at least 50% payout.
69. TextLinkAds : (CPC)
70. TMP Express : (CPA)
71. Tremor Network :
72. Tribal Fusion : (CPM)
73. Veoda : (CPC) ; 60-90% payout.
74. Vibrant Media IntelliTXT : (CPM)