Plugin that implements CompraFacil Payments.

If you are tracking any kind of assets the currencies gem is for you. It contains every currency in the ISO 4217 standard and allows you to add your own as well. So if you decide to take sparkly buttons as a form of payment you can use currencies to display the shiny button unicode symbol ☼ (disclaimer: ☼ may not look like a shiny button to everyone.) when used with something like the money gem. Speaking of the money gem, currencies gives you an ExchangeBank that the money gem can use to convert from one currency to another. There are plans to have ExchangeRate provider plugin system. Right now the rates are either set manually or pulled from Yahoo Finance.

A Ruby library to make use of the payments API at http://realexpayments.com

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

This is a Ruby library for integrating with SagePay. SagePay is a payment gateway for accepting credit card payments through your web app.

Gives minimally intrusive access to Global Collect's payment processing API. Currently implements a very small segment of the full API but is built with extensibility in mind.

A Ruby gem for Verifi.com's Hosted Payment Pages API.

A Ruby wrapper of Kauqian(快钱) Payment API

Help you to handle all requests to saman payment gateway

An API for using the Amazon Flexible Payment Service (FPS) - updated for version 2008-09-17 of the API.

Adds activemerchant gateway support for hash validation, querying transactions, and submitting payment via hosted forms

Need online payment?

A Ruby wrapper of Tenpay(财付通) Payment API

Package to simplify including the Adyen payments services into a Ruby on Rails application. The package provides functionality to create payment forms, handling and storing notifications sent by Adyen and consuming the SOAP services provided by Adyen. Moreover, it contains helper methods, mocks and matchers to simpify writing tests/specsfor your code.

Wrapper around the Paypal Adaptive Payments API

Simple library for payments via platnosci.pl

Simple wrapper to BNL e-Positivity payment gateway

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

An interface library for the PayPal Adaptive Payments service.

This gem provides an abstraction layer to Xpay4. SecureTrading Xpay4 is a Java Applet that handles payments via SecureTrading and receives and sends xml documents.