Verotel:
Credit Card, Online Checks & Web 900 transactions can be done!
They also have a Webmaster Refferal Program. 
 
Way Pay:
Third-party biller and affiliate consolidation and transaction recovery.  
 
Brite Pay:
No Merchant Account Required No Setup Fees, No Chargebacks, Periodic Billing, Free Shopping Cart and scripts, Free Classifieds,and most important Adult Webmasters Accepted! 
 
PPSbill Internet Billing Systems:
With PPSbill you do not need a merchant account; there are no set-up fees, maintenance fees, or on-going costs; just an easy to follow fixed rate of 12.5%.Sign up for a PPSbill account today and step into the new era of hassle free credit card processing.  
 
A1 Revenue:
Users pay with their telephone bills, instead of using credit cards, we feature a very precise system to get the control of how much they are connected, and you will get money for every minute as long they are connected. Comfortable for them and reliable for you.