EcoCash is the easiest way to accept mobile payments online. See https://ecocash.co.zw for more details.

Implementation of Loan/Mortgage functions in Ruby language. APR function and PMT function. In calculations it includes implementation of bank fee, marketplace fee, fees for each payment to provide the most precise calculation at very high speed.

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.

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

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

Gem for use Sofort Api in Ruby. Payments and check details. SOFORT Überweisung - Sofort Api Banking

Payment Method for USA ePay SOAP Webservice

Ruby on Rails gateway for SIPS/ATOS french online payments API

Spree Engine for Conekta Mexican Payment gateway

SystemPay is a gem to ease credit card payment with Natixis Paiements / CyberplusPaiement bank system. It's a Ruby on Rails port of the connexion kits published by the bank.

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.

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

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

Integration of Stripe payment gateway for use with Piggybak

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

Adds payment method for robokassa.ru

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.

This gem implements the REST API of the Sisow payment provider.

Paysera.com payment API

Launch a landing page on Heroku in less than 10 minutes with JohnHenry. This gem sets up bootstrap and provides Bootstrapped user management pages with Devise. JohnHenry also includes a payment form that works with Stripe and is ready to go immediately.