Everypay payment gateway. See https://www.everypay.gr for details.

all the information about thingspace

PayUMoney.com Payment Gateway integration for ActiveMerchant

Ultimate billing and pricing flexibility for B2B SaaS. Maxio integrates directly into your product, so you can seamlessly manage your product catalog, bill customers, and collect payments.

Red Shepherd Payments Ruby Gem

Command line client for Ripple payment platform

This engine allows users to inject requests into a queue to be processed. The queue handles bank account validations, credit payments, debit orders and collecting bank statements/notify me statements.

Ruby gem for Rent$ payment Gateway & Intermediary

["Zenith bank Globalpay payment gateway integration."]

A Gem for alipay,contains web payment and mobile payment

Turn-key E-Commerce for Ruby web applications

PaymentExpress 2.0 integration library

Manage your professional association online. Membership categories, applications to join and reclassify, annual dues payments and more.

API to integrate POLi payment gateway -- http://www.polipayments.com

One-off and subscription payments for your Rails application

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

Generate payment easily

API client library for DIDWW payment gateway (UPS)

Gem for Ruby on Rails Apps which integrate with PayU India Payment Gateway

Simple library for payments via platnosci.pl