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

ErpInvoicing adds models and services to the CompassAE core to handle invoicing and billing functions. It includes extensions to the core ERP classes for accounts and things that are 'billable' (products, work efforts), and additional models for the invoices/items, payments and the application of...

The CompassAE Commerce Engine uses the engines that implement Parties, Products and Orders, and adds the ability to conduct commerce. It implements a pricing engine, fees, payment gateways.

Spree extension for integration with PagSeguro payment. Based on spree_pp_website_standart gem

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.

Library for doing payments using DebiTech (DIBS)

A small sinatra server that supports all the actions Mollie iDeal API needs to make a payment. Now you can test your transactions on you local machine without having to make portforwards

Activemerchant patch for china online payment platform alipay

Payment Method for USA ePay SOAP Webservice

Payment Method for Skrill Transactions for Spree

Integration with TNS Payments Gateway

alpha - currently covers part of payments pro and all of mass pay

Adds payment method for mainpay.ru

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

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

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

A lightweight Ruby library for interfacing with the eWAY Token Payments API.

Spreedly is a cloud service that allows you to store credit cards and run transactions against them, enabling you to accept payments on your website while avoiding all liability and PCI compliance requirements.

Provides complete access to PayPal's Adaptive Payments API

The interface supports Account holder verifications, EFT payments, Debit orders, collecting statements.