Active Merchant extension to support Redsys payment gateway

Coinbase Commerce integration client for crypto payments

Online payment processing for internet businesses by newebpay from Taiwan

This Ruby Gem is the official reference client for the Block.io payments API. To use this, you will need the Dogecoin, Bitcoin, or Litecoin API key(s) from Block.io. Go ahead, sign up :)

Ruby implementation of BlockBee's payment gateway

Ruby Implementation of the Monero Payment Request Standard. https://github.com/lukeprofits/Monero_Payment_Request_Standard

tonglian-ruby-sdk is a light and easy to use gem. It could help developers quickly make use of Tonglian Payment Gateway's services.

SAKIDE encryption modul for CIB bank credit card payments

OffsitePayments for Pay2go

Checks integrity of Yandex.Money payment notification by comparing SHA of strigified params including a secret shared with Yandex.

To accommodate the SSO functionality of SallieMae Business Office Solutions Electronic Payment Gateway within a Rails applicaiton.

Encryption in Ruby to interface with SagePay's payment gateway protocol v3.

Simple gem for Robokassa payments. This gem can work with Robokassa API.

Spree extension for integration with GoPay payment gateway.

Responsible for handling referral links and all referral related operations like capture actions, show partner dashboard, payments etc.

PayUMoney.com Payment Gateway integration for ActiveMerchant

A RubyGem that interfaces with the Authorize.net payment gateway

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

Beyonic.com makes enterprise payments to mobile easy. Details: http://beyonic.com

Uses blockchain.info's json API to generate 'checkout wallets' that can be associated with sales or customers. Your are notified when payments are made in multiple ways.