There is a lot of free ecommerce engine that you can use for free. Each ecommerce engine have feature and caracteristic it self. You can choose one of them that suitable for your requirement. You can also modify template design yourself. Or just find out free template on the internet. This is sort list of free ecommerce engine that you can use for free.

prestashop

Prestashop is free ecommerce engine. Prestashop adapted a lot of web 2.0 feature. There is alot of feature, Integrated payment module, and search engine friendly, its good for your SEO.

You can view all features and requirements here.

Requirements: Apache, PHP 5.0+, MySQL 5.0+
Demo: http://www.prestashop.com
Download: http://www.prestashop.com

zencart

Zen Cart™ is the free -commerce, user-friendly and open source shopping cart software.

Requirements: Apache, PHP +, MySQL
Download: http://www.zen-cart.com

oscommerce

osCommerce is an Open Source online shop e-commerce solution that is available for free under the GNU General Public License. It features a rich set of out-of-the-box online shopping cart functionality that allows store owners to setup, run, and maintain online stores with minimum effort and with no costs, fees, or limitations involved.

Requirements: Apache, PHP +, MySQL
Download: http://www.oscommerce.com/solutions/downloads
Demo: http://demo.oscommerce.com/

VirtueMart

VirtueMart is an Open Source E-Commerce solution to be used together with a Content Management System (CMS) called Joomla. Joomla and VirtueMart are written in PHP and use in a PHP/MySQL environment.

Requirements: Apache, PHP +, MySQL
Demo:http://demo.virtuemart.net/

Digistore

Digistore Ecommerce is a fully featured open source ecommerce solution based on the popular osCommerce engine. Boasting improvements both to the administration and the end user experience - Digistore has quickly become a popular choice for people wishing to market products online.

Requirements: PHP Server with MySQL
Download: http://www.digistore.co.nz/download.php
Demo: http://digistore.co.nz/

Magento

Magentoo is a new professional open-source eCommerce solution offering unprecedented flexibility and control.

Requirements: Apache Web Server (1.x or 2.x), PHP 5.2.0+, MySQL 4.1.20+
Download: http://www.magentocommerce.com/download
Frontend Demo: http://demo.magentocommerce.com/
Backend Demo: http://demo-admin.magentocommerce.com/(Admin Username: admin Password: 123123)

Ubercart

Ubercart is an exciting open source e-commerce 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!

Requirements: -
Download:http://www.ubercart.org/downloads
Demo: http://www.ubercart.org/

OpenCart

OpenCart is an open source PHP-based online shopping cart system. 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.

Requirements: Apache, PHP 5+ and MySQL
Demo: http://www.opencart.com/demonstration
(Username: demo / Password: demo)

FatFreeCart

FatFreeCart is the free version of E-junkie shopping cart. Get Google CheckoutIt works inside your website, your blog and will even work from your MySpace page. It is simply a copy-paste cart and does not require you to register with us or install anything.

SimpleCart(js)

SimpleCart(js) is a simple paypal shopping cart in under 11kb that you can setup in minutes. It uses cookies to keep track of the items in the cart. Therefore, simpleCart(js) doesn’t require any databases or programming knowledge. You simply need to know some basic HTML.

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