Authorize.net
Payment processing merchant services, allow business to authorize, settle, and manage credit card and electronic check transactions online.
http://www.authorize.net/
Google PR:
BillingServices.com
Provides credit card processing services to hundreds of internet merchants.
http://www.billingservices.com/
Google PR:
Capitalone.com
Capital One offers a variety of financial services to individuals and small businesses including credit cards, auto and installment loans, money market accounts, mortgages, insurance, and savings products.
DiscoverCard.com
Issues the Discover card and other cards under the Novus brand.
http://www.discovercard.com/
Google PR:
MasterCard
Apply online and find the MasterCard that's right for you. Whether it's a personal credit card or one for your small business MasterCard holders have exclusive access to online offers and automatic monthly payment options.
http://www.mastercard.com
Google PR:
MBNA America
The world's largest independent credit card issuer.
http://www.mbna.com
Google PR:
PlugnPay.com
Accept Credit Cards & Electronic Payments With Plug 'n Pay. We offer a complete line of billing and ecommerce payment solutions. Feature-Rich, Low Cost Online Realtime Credit Card Acceptance.