A template-driven customizable PHP shopping cart utilizing MySQL or PostgreSQL. Interfaces with numerous payment, tax, and freight methods. [Shareware]

Build and customize a complete Amazon.com Associate Store. [Commercial]

A PHP interface to the authorize.net merchant gateway, which lets you set up your site to take credit card payments. By PHP Labs. [Commercial]

Classes for bank account validation. It may be easily integrated into an existing project. At the moment only (but all) German bank accounts are supported. [Open source, GPL]

An online store which features a product catalog, shopping cart, orders and administration page. Databases are flat text files and its can edit them through web browser or off-line in a text editor. [Commercial]

PCI compliant shopping cart. Comes with number of shipping and payment modules, B2B functionality. Was originally built from osCommerce. [Commercial, Opensource GPL]

A PHP script which allows start templates business. It support selling single templates and membership based templates sites. Also it support templates uploaded, members subscription, files management. [Commercial]

Fully self-administered shopping cart that works with PHP/MySQL. Pricing and online order.

PHP Shopping Cart. It use MySQL and not requiring knowledge of HTML or programming. Demo available. [Commercial]

Fully customizable domain registration system utilizing the eNom reseller API with integrated payment gateways. Requires MySQL.