PAY.JP makes it way easier and less expensive to accept payments.

Ruby API for Amazon Web Services Flexible Payment Service

This Spree extension allows admin to provide bank transfer payment method to its users.

Amazon Payments - Login and Pay with Amazon Ruby SDK

Accepts orders via http, returns payment info via http or streams updates via websockets, stores orders in a DB

To award loyalty points and add loyalty points payment method to spree

[Deprecated] It is recommended to use paypal-server-sdk instead. The PayPal Permission SDK provides Ruby APIs for developers to request and obtain permissions from merchants and consumers, to execute APIs on behalf of them. The permissions include variety of operations from processing payments to...

Accept online payments, create a Platform, and pay out to your sub-entities, sellers and service providers.

TrueLayer provides instant access to open banking to easily integrate next-generation payments and financial data into any app.This helps easily sign TrueLayer API requests using a JSON web signature.

A Ruby gem wrapper for the pin-payments (pinpayments.com) API

A straight-forward REST API for Amazon's Flexible Payments Services.

PayPal Express Checkout API Client for Instance, Recurring and Digital Goods Payment.

Drop Zone is a solution to the problem of restricted sales in censored markets. The proposal is for the design of a protocol and reference client that encodes the location and a brief description of a good onto The Blockchain. Those wishing to purchase the good can search for items within a user-...

Quickly build an online store with carts, orders, automatic email receipts and payment collection via Stripe, StripeConnect, PayPal and Moneris.

Experimental library for working with GoogleCheckout. Currently in use for payment at http://peepcode.com.

Launch a landing page on Heroku in less than 10 minutes with JohnHenry. This gem sets up bootstrap and provides Bootstrapped user management pages with Devise. JohnHenry also includes a payment form that works with Stripe and is ready to go immediately.

Experimental library for working with GoogleCheckout. Currently in use for payment at http://peepcode.com.

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

Simplifies generating payment requests and parsing responses from banks when using iPizza protocol.

Add wallet payment method functionality to spree