PayPal  
   Service allows visitors to send money and bills to anyone with e-mail, auctions, classified sites, and personal web sites.
   http://www.paypal.com/

WorldPay  
   Offers a range of e-payment and e-commerce solutions.
   http://www.worldpay.com/

EscrowGuardian.com  
   Provides a means of exchanging goods between two parties. An escrow service where the money will be held while the exchange takes place.
   http://eg20.escrowguardian.com/

PPPay.com  
   Payments by email, offering a choice between instant and escrow payments.
   http://www.pppay.com/

Payko  
   Allows sending money orders to several countries by payment from a PayPal account. Can be used for auctions where the seller does not accept PayPal.
   http://www.payko.com/

Blue-Pay.com  
   Allows creation of a payment system for web sites.
   http://www.blue-pay.com/

Pay Mart  
   Allows registered users to send money and bills to anyone with e-mail. Payments for auctions, classified sites, and personal web sites.
   http://www.paymart.com/

Western Union Auction Payments  
   Allows buyers to pay by purchasing money orders. Accept payments from most international buyers, for US and Canadian sellers and some international locations.
   http://www.auctionpayments.com/

Trans Fee  
   Enables sellers to charge a dynamic handling fee based on the current PayPal transaction rate.
   http://www.transfee.com/