WooCommerce WorldPay Gateway GPL Overview:

Take payments via Worldpay

The Worldpay gateway plugin lets you accept credit card payments via a secure, hosted payment page. Because Worldpay handle the payment process for you, no SSL certificate is required on your site.

Worldpay’s affordable online payment gateway enables your business to accept all major payment methods and credit and debit cards, including Diners, MasterCard, Visa, Amex, Maestro and JCB.

On your store, when an order is placed by a customer, the customer is taken to Worldpay to make a secure payment. After the customer completes their payment the order is confirmed and the user is taken to the thank you page on your site. This all takes place in one tab, for a seamless user journey.