Top Credit Card Processing

Some of the top credit card processing companies :-

[Google Checkout]
Available in US and UK only

[Paypal]
Overview : Intro of Website Payments Standard, Comparison, Pricing
Availability : Malaysia and Internationally
Notes :
Receive payments from more than 150 million accounts worldwide
Sell to customers in 190 countries using 17 currencies
Withdrawal Fund To : Visa Credit Card or Visa Electron Debit Card
Processing Time : 5~8 Business Days
Charges : USD5
Minimum Withdrawal Amounts :
Australian Dollars $15.00 AUD
Canadian Dollars $15.00 CAD
Czech Koruna 240.00 CZK
Danish Krone 60.00 DKK
Euros €10.00 EUR
Hong Kong Dollars $80.00 HKD
Hungarian Forint 2,100 HUF
New Zealand Dollars $15.00 NZD
Norwegian Krone 65.00 NOK
Polish Zloty 30.00 PLN
Pounds Sterling £6.00 GBP
Singapore Dollars $15.00 SGD
Swedish Krona 80.00 SEK
Swiss Francs 13.00 CHF
U.S. Dollars $10.00 USD
Yen ¥1,000 JPY

Others :
Authorize.net ( checkout their reseller list )
Paynet Systems
Merchant Express
Charge.com
Total Merchant Services
FreeAuthNet.com
CardServiceInternational
Merchant Warehouse
Merchant Accounts Express
Electronic Transfer Inc
FreeAuthNet.com
Merchant Credit Card
E-Commerce Exchange
Total Merchant Services
AmeriMerchant

Reference :
From http://www.creditorweb.com/processing/categories/internet-credit-card-processing.html
From http://credit-card-processing-review.toptenreviews.com/