Qiwi payments solution

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.

Easier Rabobank OmniKassa payments

Allows easy calculation of revenue sharing by app and in-app purchases. Munges the monthly CSV reports from Google Play or Amazon Android app stores. Does Amazon currency conversions and verifies against payment amounts.

Spree Engine for Conekta Mexican Payment gateway

Unofficial alfabank payment gateway gem

Adds Cielo as a Payment Method to Spree Commerce

A ruby gem to connect your application with ProxyPay(https://www.proxypay.co.ao) API that allows your application to interact with the Angolan ATM system knows as Multicaixa for online payments by reference.

Liqpay.com payment gateway integration for Spree E-Commerce.

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

A Ruby wrapper of Kauqian(快钱) Payment API

Easily integrate the Apruve B2B payment network into your ruby-based application.

Ruby client library for integrating with Affirm financing payments

Simple REST API for the CyberSource Global Payments Platform

Payu (polish payment service) rails engine.

Ruby API Library for Vesta's vSafe Payment Gateway.

Sermepa is a spanish payments gateway

This is currently a dummy until a public beta is over

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

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