Merchant Services
3D Secure Maestro - http://www.barclaycard.co.uk/business/existing-customers/authentication/
Barclaycard are a leading provider of payment handling, merchant services and business credit cards.
Gateway Payments - http://www.securetrading.com/payment-gateway.html
SecureTrading offer internet merchant accounts, payment gateways and virtual terminals to help credit card processing online for businesses.
PayByWeb - http://www.paybyweb.com/
Offers a variety of merchant accounts and check services to big and small businesses. Includes fees information, testimonials, FAQ's and newsletter.