Branched from the popular osCommerce to provide better user experience and improved e-commerece features with search engine friendly and semantic code, TomatoCart is an open source PHP ecommerce solution backed with Ext JS based rich administration.

Features

• Wysiwyg html editor for product descriptions
• Product Comparison
• One-Page Checkout
• Newsletter Manager
• Abandoned Cart Management
• Multi-lingual shopping Cart Solution
• Integrated Web Analytics Software – Pwik

eCart is an open source shopping cart software that offers the ability to build a powerful & search engine friendly shopping cart.

Shopping Cart Features

• Easy store management
• One page checkout
• Search Engine Friendly
• Advanced Catalog Filters

eCart is build upon Zend Framework (PHP), jQuery(frontend, backend), Ext JS (backend) and MYSQL.

nopCommerce is an Open Source Ecommerce Software written in ASP.NET 3.5 and use MS SQL 2005 (or higher) as back-end database. This Free Ecommerce Software is fully customizable, stable and highly usable. nopCommerce is a solution with comprehensive features that is easy to use for new online businesses, yet powerful enough for the most demanding ecommerce.

Ubercart is an open source e-commerce shopping cart package that fully integrates your online store with Drupal, the leading open source content management system. This is a killer combination for anyone looking to build a community around a product, sell access to premium content, offer paid file downloads, and much much more!

Ubercart leverages the advantages of Drupal’s major core and contributed systems, providing your users with shopping cart functionality that integrates with other parts of your company or community website.

OpenCart is an open source PHP Shopping Cart. A robust e-commerce solution for Internet merchants with the ability to create their own online business and participate in e-commerce at a minimal cost.

OpenCart is designed feature rich, easy to use, search engine friendly and with a visually appealing interface and a complete online solutions for your online bussine.

OpenCart can be installed on any web server running Apache, PHP 5, MySQL.

Website: http://www.opencart.com

View Demo

Digistore Ecommerce is a fully featured open source ecommerce solution based on the popular osCommerce engine. Whether you are an established online retailer, or a new business venture, Digistore provides the foundation for successful online marketing.

There is a lot of programatic headache that can be accompanied by attempting to tackle the Google Checkout API. With the overhead of any online monetary transactions and three different layers of integration means a lot of documentation to cover. The gCartEncoder is a PHP library that allows you to alleviate some of the headaches and get an implementation of a phase one integration in place.

PrestaShop is another robust, professional-grade e-Commerce solution that you can download, install, and use for free. On the back end, you’ll use a full-featured back-office application to manage your online business (including inventory, orders, shipping, and customers) in real-time. Your customer’s payments are sent directly to your commerical bank account using the latest security technology.

Some Features:

• Featured products on homepage
• Cross-selling (Accessories)
• Merchandise return (RMAs) & credit slips
• PDF customer invoice
• Bulk lister/import .CSV files
• Content Management System (CMS)
• Reports
• Loyal customer program

Website: http://www.prestashop.com/

Demo: http://www.prestashop.com/en/showcase_demo

Download: http://www.prestashop.com/en/downloads/