osCommerce

An open source eCommerce solution that allows store owners to setup, run and maintain their stores with minimum effort. Includes a long list of features.

RediCart

RediCart is a simple, powerful Perl-based shopping cart system designed to enable merchants to accept credit card and/or check payments online in real-time.

AgoraCart

A full featured system that features SSL support, image uploading, multiple sales taxes, customer and admin order confirmations, UPS and USPS real-time shipping, handling fees, product options, flexible order forms, flatfile database with import/export and more.

AllCommerce

This script provides webbased admin access to inventory and order information. Modules available for content, order, inventory, and promotion additions.

ECW-Shop

A shopping cart that can use MS Excel or Access format for a database. Users can calculate progressive discounts, search for keywords and prices.

ShopCMS Shopping Cart

An advanced content management system designed as an easy to use and configure shopping cart. It supports full PayPal integration, customizable templates and more.

The CITY Shopping

This script supports multiple stores, languages, currencies, UPS shipping, online merchants, and more. The script is built modular, so multiple shops can share a database.

Commerce.cgi

Commerce.cgi is a full shopping cart system complete with a browser based store manager for adding, editing, and deleting products from your inventory.

cpCommerce

This script combines many utilities and allows you to completely customize the entire layout through modules and templates.

phpShop

A web-based administration interface for all aspects of your online shop including users, products, orders and more. Built from the administration area 

Quick Cart

Quick.Cart is a simple to install and use e-commerce solution. It works on flat files system, so you don't even need database.

Amazon Webstore

A shopping environment for Amazon associates who wish to tap into Amazon's vast database of products.

Shopping Cart Builder

A complete eCommerce suite for simple and advanced shopping cart needs.

PayPal Store Front

A store front with PayPal compatibility that features multiple product categories, unlimited products, sales, temporary out-of-stock product removal and more.

Merchant-Store

This e-commerce solution includes three different shopping carts with an integrated customer order manager and online catalog builder.

Ecommerce Shopping Cart Software

Enables small businesses to sell online using a reliable, easily customizable, feature packed, high performance online shopping cart with no coding required.

MyCatalog

Ideal for small- and medium-scale enterprises, this script allows storeowners to create online product catalogs. The admin can add, delete and modify entries

FishCart

Designed for use as a shopping cart or catalog management system, and includes features such as: multiple catalogs, multiple language support and more.

ECHOcart

A scalable and customizable storefront for medium-to-large sites.

MyCart

A collection of PHP scripts which serve as the basis for a shopping cart or online ordering system.

CosmicShoppingCart

A shopping cart script to eCommerce-enable your site. It supports several credit card companies, including PayPal.

ShopCMS

Advanced paypal shopping cart, catalog manager and CMS. Supports full paypal shopping cart integration and customizable templates.

CommerceSQL

This script is designed for those that need a shopping cart capable of handling more then a handful of products.