The main ones are Google AdSense and Yahoo Publisher Network (only available to people in the United States). Other than that you can try Clicksor, the are others out there but they aren't good at all. MSN might be rolling out an alternative in 2007.
Yes, I agree that YPN is the other great CPC program next to Google. However, it only open to US citizens..
has anyone used bitvertise, if yes, then please let me know, that they pay or not......... google adsense is the best, waiting for the ypn to finish it's beta run,
iv used them befor for both adverting and publishing but i dont think they are very good for the price u pay for the clicks and how many hits u get from them is kinda crap and ther payout for publishers is very rubish i was on google adsense and then they said i violated ther terms but the only thing i can think of is that i had a donate button about 2 cm from the adverts but like i hav hundreds in my google bank aswell so i was very ****** off any ways thanks for all your posts.
you can also try Kontera. I think i've tried almost any google adsense alternative but kontera comes very close with adsense as far as earning is concerned
This site listing a few alternatives http://www.internet-search-engines-faq.com/google-adsense-alternatives.shtml