This library is meant to interface with PayPal's Adaptive Payment Gateway.

[Deprecated] The PayPal Adaptive Payments SDK provides Ruby APIs to create, process and manage simple and complex (parallel and chained) payments, and pre-approvals using the Adaptive Payments API.

Ruby client library for the GMO Payment Platform.

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

CIC Payment is a gem to ease credit card payment with the CIC / Credit Mutuel banks system. It's a Ruby on Rails port of the connexion kits published by the bank.

CPS (Complete Payment Systems) card payment service API in Ruby

Adds Alipay Payment as a Payment Method to Spree Commerce

Creates buttons to manage paying with amazon payments. Can be used for direct payments or merchant payments

Payment library seeking to make payment interactions simple and reusable.

The gem abstracts away the low-level details of the API, providing a simple and intuitive interface for sending payment requests, checking payment status, and managing payment callbacks

Robokassa is payment system, that provides a single simple interface for payment systems popular in Russia. If you have customers in Russia you can use the gem. The first thing about this gem, is that it was oribinally designed for spree commerce. So keep it in mind.

A library to interface with Fawry's payment gateway API (charge, refund, payment status, service callback).

acts_as_payment is a rails plugin that enables you to work with bills.

Client for ReCharge Payments recurring payments API for Shopify

Instamojo Ruby library - Assists you to programmatically create, edit and delete offers on Instamojo. Also supports listing, updation and details of Payments, Payments Requests and Refunds.

Ruby client for Moneybookers Automated Payment Interface and Payment Gateway

One-off and subscription payments for your Rails application

Enable spree store to allow payment via GTPay, a GTBank Payment Gateway for Nigeria

Integration with polish payment method: Przelewy24

Multiple Payment Gateway support. Authorize.net, Braintree, Fortis