Shopping Cart System has a easy way to integrate your store with some payment processing solutions. The default will only send the order to your email using USA Sat SSL form. To access this option go to "Utilities" then "Send Form Config.." When this field is selected, your store will use the USA Sat ScS order form to send the order to your email and, a copy to your customer Note: Free to use with any hosting service: Click here to see the disclosure. http://www.usasat.net

2Checkout is the online distribution center for over 300,000 tangible or digital products and services. Established in 1999 and headquartered outside Columbus, Ohio, 2Checkout.com Inc. provides turnkey e-commerce solutions to thousands of business customers around the world.
http://www.2Checkout.com


WorldPay's services range from entry level storebuilder and secure online payment processing solutions, to high-end, multicurrency transaction processing systems for larger organizations with an established web presence.
http://www.worldpay.com


PayPal lets you send money to anyone with email. PayPal is free for consumers and works seamlessly with your existing credit card and checking account. You can settle debts, borrow cash, divide bills or split expenses with friends all without going to an ATM or looking for your checkbook.
http://www.paypal.com


Payflow^SM Link is the right solution for you, the merchant, if you are looking for a fast and easy way to conduct secure automated transactions over the Internet.
http://www.verisign.com

Note: The "Send Form Configuration" can be configured to use other payment processing solutions. Usually using the same method of posting the information as those companies above. The configuration parameters, can be found on the help file or samples provided by each individual companies.