Included in ZenCart 1.3* are
Authorize.net authorizenet
Authorize.net (AIM) authorizenet_aim
Credit Card cc
Cash on Delivery cod
The Zen Cart FREE CHARGE CARD freecharger
Check/Money Order moneyorder
Paypal IPN
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There are more in downloads section which is currently being
recomplied after "script kiddies" hacked original site