WorldPay is a payment service provider for all sizes of business. Accept debit and credit card payments online and in multiple currencies. WorldPay Payment Gateway is a WordPress Plugin which allows the WP E -Commerce plugin to accept credit card payments without worrying the Customers Credit Cards Details which are taken care by the WorldPay.
Demo: http://codecanyon.net/item/worldpay-gateway-for-wp-ecommerce/2847657