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.
PayPal: Service allows visitors to send money and bills to anyone with e-mail, auctions, classified sites, and personal web sites.
PPPay.com: Payments by email, offering a choice between instant and escrow payments.
WorldPay: Offers a range of e-payment and e-commerce solutions.