Payment gem

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

BankLink payment plugin using ActiveMerchant for use with Lolita CMS

Kill Bill payment plugin for Bitpay.

Ruby library for Nihaopay payment gateway API

API wrapper for Sinopac E-Commerce Payment APIs.

A simple payu payment gem

API wrapper for transferuj.pl payments

Integration with TNS Payments Gateway

With mechanize store you already have implemented Product, ProductPhoto, ProductCategory, Order, OrderStatus, Payment, PaymentStatus, OrderItem and ProductItem

Add iDEAL payment to spree

Ruby library for integrating with the MundiPagg payment web services

Adds Dwolla as a Payment Method to Spree

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 gem to handle the requests to the payment api

Performing multiple payments to PayPal using the MassPay API

Payment Gateway to Paybox's services

Client gem for the PaymentSpring Gateway

Payture payment system API for sendind cheques separately from payments

Ruby client for Payments HTTP API