PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.

Payum offers everything you need to work with payments. From simplest use cases to very advanced ones.

Mollie Payments for Magento 2

Mollie Payments for Magento 1.x

Rich payment solutions for zend framework2. Paypal, payex, authorize.net, be2bill, omnipay, recurring paymens, instant notifications and many more

Rich payment solutions for Yii framework. Paypal, payex, authorize.net, be2bill, omnipay, recurring paymens, instant notifications and many more

Rich payment solutions for Silex framework: Paypal, Stripe, Payex, Authorize.NET, Be2bill, Klarna, recurring paymens, instant notifications and many more

Mollie payments plugin for JTL-Shop

Accept Credit Cards, PayPal and many other payment methods in your WooCommerce store

Novalnet Payment Module for OpenCart

OroCommerce Payment Integration by Novalnet

Novalnet Payment Module for gambio

Magento 2 Payment Integration by Novalnet

Sofort Pay api php wrapper

[READ-ONLY] Subtree split of the Payum Sofort Component -- clone into Payum/Sofort/ (master at payum/payum)

Sofort payment plugin for HikaShop

Drupal Commerce Payment Integration by Novalnet

Creates Payment Dummies for backend order creation

MemberPress Payment Integration by Novalnet

The common implementation part of my «Kassa Compleet» and «Ginger Payments» Magento 2 extensions.