The on-line payment systems are e-commerce businesses allowing money transfers to be made only through the Internet. They function as a fast and secure electronic alternative to traditional methods as cheques and money orders. The systems perform payment processing not only for online vendors, auction sites, and other corporate users but between their costumers, for which it charges a fee which is much less than the bank wire transfer equivalent.
A payment gateway is an e-commerce application service provider service that authorizes payments for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar. It is the equivalent of a physical point of sale terminal located in most retail outlets. Payment gateways protect credit card details by encrypting sensitive information, such as credit card numbers, to ensure that information is passed securely between the customer and the merchant and also between merchant and the payment processor.
Here is a list of payment gateway systems you can use for your site:
Enets – www.enets.com
AsiaPay – www.asiapay.com
GT Payment – www.gtpayment.com
Paypal - www.paypal.com
WorldPay – www.worldpay.com
2Checkout – www.2checkout.com
Globalcollect – www.globalcollect.com