ActivePayment is an abstraction layer for different Payment-Interfaces (XML, JSON)

This gem make it easier to implement payment system with Paidy

ActiveTiger allows you to simply add payment processing to your application using Tiger Payment Solutions

A Ruby Interface to Alipay Payment Gateway. Unofficial.

This gem can help you integrate Alipay Dual-function Payment.

A simple gem to calculate amortizing loan payments, as part of training at Samyukti

This is currently a dummy until a public beta is over

Alternative Payments ruby gem sdk. Accept local payments from all over the world

This gem provides a Rails interface to the Amazon Simple Pay payment service.

Adds activemerchant gateway support for hash validation, querying transactions, and submitting payment via hosted forms