Ruby client library for integrating with Affirm financing payments

Allows easy calculation of revenue sharing by app and in-app purchases. Munges the monthly CSV reports from Google Play or Amazon Android app stores. Does Amazon currency conversions and verifies against payment amounts.

Payment Method for USA ePay SOAP Webservice

Easier Rabobank OmniKassa payments

EPC QR code for SEPA payments in any format

This gem was designed to help you to access the locaweb payment gateway.

An engine for the Straight payment gateway software. Requires no state to be saved (that is, no storage or DB). Its responsibilities only include processing data coming from an actual gateway.

This gem implements the REST API of the Sisow payment provider.

Adds Purchase Order as a Payment Method to Spree Commerce

Integrates the mpay24 credit card and online payment processing system into the spree web shop

Sermepa is a spanish payments gateway

Integration of Stripe payment gateway for use with Piggybak

A Jekyll plugin to add Web Monetization API payment pointers to your site

[Deprecated] The PayPal Adaptive Accounts SDK provides Ruby APIs to create and manage PayPal accounts, add payment methods to accounts and obtain account verification status using the PayPal Adaptive Accounts API. It is recommended to use paypal-server-sdk instead

Payments platform for marketplaces

Add support for Pagseguro checkout as a payment method.

Liqpay.com payment gateway integration for Spree E-Commerce.

A gem to deal with Wechat payment.

This is currently a dummy until a public beta is over

Adyen HPP payments for Solidus Stores