There are literally hundreds of payment gateways all over the world & it can becoming a big pain supporting them in your Joomla extensions. The Common Payments API is a standard way to integrate with supported Payment Gateways. The standard abstraction layer of the Common Payments API ensures that whichever gateway you want to integrate your extension with, you dont need to make any special changes in your extensions. Using this API in your extensions ensures that your extension will work with all supported payment gateways.
The Common Payments API was released as GPL open source code at the Joomla World conference in 2012 & has since been adopted by many extension developers. Future plans for the API include trying to get it included in the Joomla core as libraries in the platform/framework.
Please note that though the list here is updated here from time to time, to check the latest list of supported gateways, check the Git Hub page
Standard Payment Gateways
CCAvenue EWay Rapid
PayPal (with recurring) PayPal Adaptive
Pay U India
Points/Cash systems, Offline Methods
Pay By Check Pay By Purchase Order
Alpha User Points JomSocial Points
Pay by Jwallet Cash ( Techjoomla Extension)
If you are not a developer but need a payment gateway we dont support yet, you can contract us to develop it for you ! We offer Paid services to develop integrations for any payment plugins you might need. So Contact us today !
The Common Payments API project is community supported. Jump on to the forum to report any issues, improvements that you might have on the forum. http://techjoomla.com/forums-community-support/categories/cpg/listings.html