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

QR-bills support for swiss payments, for full documentation please refer to github repo: https://github.com/damoiser/qr-bills

Helping rubyist integration with cmb (China Merchants Bank) payment service (招商银行一网通支付) easier.

Radiant Shop is an attempt at a simple but complete store. It includes Products, Categories, Orders and Credit Card Payments

A soapy interface to ACH Direct's PaymentsGateway.com service.

Client for ReCharge Payments recurring payments API for Shopify

Kill Bill payment plugin for Paypal Express Checkout.

WebPay is payment gateway service in Japan. See also https://webpay.jp/.

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

Provides integration with the Fat Zebra internet payment gateway (www.fatzebra.com), including purchase, refund, auth, capture and recurring billing functionality.

Gem for integration CSOB PaymentGateway in Ruby

M-Pesa SDK for Ruby is an unofficial library aiming to help businesses integrating every M-Pesa operations to their Ruby applications.

Provides the feature for a Spree store to allow user to club payment methods to pay for the order

A mountable Rails engine to create a payment server that can handle the money in your Bitcoin ecosystem

Adds payment method for robokassa.ru

Simple REST API for the CyberSource Global Payments Platform

A Jekyll plugin to add Web Monetization API payment pointers to your site

This gem allows your Ruby (1.9.2+) or Rails (3.2+) app to quickly integrate with Culqi Payment processor. It handles Culqi's flavor of encryption, decryption and Culqi ticket creation.

iDEAL payment gateway for ActiveMerchant (see http://www.ideal.nl and http://www.activemerchant.org/)

Validation for Dutch bank account numbers, Citizen Service Numbers (BSN) and Payment reference