This library is for use with Braintree's payment gateway in concert with one of the supported client libraries. It encrypts sensitive payment information in a web browser using the public key of an asymmetric key pair.

Stripe Payments Integration with Catarse crowdfunding platform.

Online payments using dotpay.pl

Accept payments from Liberty Reserve

jQuery.payment is a general purpose library for building credit card forms, validating inputs and formatting numbers.

A Lyre for Braintree's payment gateway

Provides Paypal web payments standard support to nimbleshop

Active merchant integration for EBS Payment Gateway from India

A gem for e-payment systems API's and SCI's

subsify is a Ruby client for the Subsify Subscription Payment API.

Moip payment service integration library.

Offsite payments using the Dutch Omnikassa service from Rabobank.

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.

Client gem for the PaymentSpring Gateway

This library is meant to interface with PayPal's Adaptive Payment Gateway.

IFMB payments for spree

Generate references for IFMB payments (portuguese ATM payment service from IFTHEN)

Qiwi payments solution

This gem provides you a PriceSetting class which allows you to send request to the Zaypay API in order to create payments, display payment details and contains other useful methods. Pleases refer to http://zaypay.com/developers for more information on the Zaypay API

Cash on delivery payment method for Spree