ROBOKASSA is an aggregation of payment systems. With one contract you will be able to accept payments from your customers using a large amount of payment systems.
The free payment extension ET Payment Robokassa allows you to use the payment gateway Robokassa (robokassa.ru) on your website. Robokassa combines a large amount of payment services which will be available to you by installing just one extension.
Please be advised that Robokassa provides a contract only with a person that has an account in one of the banks in Russia.