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

An API for using the Amazon Flexible Payment Service (FPS).

A library to make online payments using ABN-AMRO (Dutch bank) Internetkassa.

Ruby API for Amazon Web Services Flexible Payment Service

An experimental library for sending payment requests to Google Checkout.

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

Package to simplify including the Adyen payments services into a Ruby on Rails application. The package provides functionality to create payment forms, handling and storing notifications sent by Adyen and consuming the SOAP services provided by Adyen. Moreover, it contains helper methods, mocks and matchers to simpify writing tests/specs for your code.

BreadMachine facilitates payment processing, including 3-D Secure, with the SecureTrading XPay gateway

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

Generate Swiss DTA payment files to extract payments from your existing application

Payment Framework focused on Authorize.net CIM for dealing with stored credit card transactions.

Wrapper around the Paypal Adaptive Payments API

A rails plugin to add an active_merchant patch for china online payment platform

A gem to provide a ruby interface for Chase Paymentech Orbital payment gateway. It has been development thus far to meet specific ends, so not all functionality is present.

Resources and tools for developers to integrate Braintree's global payments platform.

Lightweight wrapper for Paypal's Adaptive Payments API

Ruby codebase for creating payment batch files for DCAS, uploading them, and receiving response files from DCAS.

Syncs your AR models with Braintree (Payment Gateway) and offers a lightweight reoccurring billing script

Turn-key E-Commerce for Ruby web applications

RubyTML (or just RTML) is a Ruby framework for communicating with Ingenico's Incendo-based payment devices.