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

An engine for the Straight payment gateway software. Requires no state to be saved (that is, no storage or DB). Its responsibilities only include processing data coming from an actual gateway.

A simple gem to integrate Rails app with Webpay Interswitch, a nigerian payment gateway

Online payments using dotpay.pl

Adyen HPP payments for Solidus Stores

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

Payment Method for USA ePay SOAP Webservice

Adds payment method for robokassa.ru

Kill Bill payment plugin for Paypal Express Checkout.

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

This is currently a dummy until a public beta is over

Provides an interface to AzeriCard online payment processing system

Simple rails engine to add payments to your web application using sermepa standard web tpv

trade, payment

Stripe Payments Integration with Catarse crowdfunding platform.

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

Easier Rabobank OmniKassa payments

Paysera.com payment API

Gem using curl to post to Venmo payment gateway

PingPlusPlus is the easiest way to accept payments online. See https://pingxx.com for details.