osCommerce is an online shop e-commerce solution that offers a wide range of out-of-the-box features that allows online stores to be setup fairly quickly with ease. osCommerce (“open source Commerce”) is an e-commerce and online store-management software program.

Magento is an open-source ecommerce web application launched on March 31, 2008. Magento is an e-commerce software application written in PHP, and is closely integrated with the Zend Framework. Magento can be run in a wide variety of environments: Windows, Mac, and Linux alike. In the spirit of open source.

Ubercart is an e-commerce and web-based store management software program, available as a plug-in module for the Drupal CMF. It can be used on any web server that has PHP and MySQL installed. It is available as free software under the (GNU) General Public License.

VirtueMart (formerly known as mambo-phpShop) is an open source e-commerce solution designed as an extension of the Mambo or Joomla. VirtueMart is written in PHP and requires the MySQL database environment for storage.

Zen Cart™ truly is the art of e-commerce; free, user-friendly, open source shopping cart software. The ecommerce web site design program is being developed by a group of like-minded shop owners, programmers, designers, and consultants that think ecommerce web design could be and should be done differently.

PrestaShop is a professional e-commerce shopping cart content management system, which you can download and use for free. The software PrestaShop was founded in Paris, France by Igor Schlumberger and Bruno Leveque.

osCMax is a powerful e-commerce/shopping cart web application derived from the popular osCommerce project but extended and rewritten by a team of developers. It can be used on any web server that has PHP and MySQL installed.

Batavi is an open source web shop under the (GNU) General Public License. The development of Batavi started in 2007 inspired by a preliminary osCommerce 3.0 version, a version that seemed to be never finished by the osCommerce team. It is written in PHP.