There are few more E-gold Alert Pay Ebullion Pecunix Epassporte webmoney And I don't know the names of others, But above mentioned all are good and well known payment processors (though not most widely used).
I'm assuming you're referring to 3rd party processors. Here's a few more. 2checkout.com CCBill CCNOW Ikobo MultiCards Propay Verotel
Paypal 2checkout worldpay moneybookers protx chronopay Hsbc Barclay Multicards Authorize.net There would be more list..
Authorize.net is a payment gateway, not a payment processor. They facilitate the processing of a transaction between a website and a business's merchant account, but they are not a processor themselves.
Authorize.Net is a great gateway. I think it is one of the best. We offer authorize.net to our merchants. It's compatible with most major shopping carts.
e-gold e-bullion pecunix webmoney but these are no payment processors, these are ecurrencies. as payment processors i would say: paypal epassporte moneybookers ecocard alertpay paypay regards