osCommerce is the leading 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 their online stores with minimum effort and with no costs, license fees, or limitations involved.

Founded in 2002 in response to hosting-customer demands, Chain Reaction Ecommerce began development of CRE Loaded, a complete online store/shopping cart application. CRE Loaded delivers a host of powerful features in one stable Open Source application. Building on the capabilities of the widely accepted osCommerce package, CRE Loaded takes good and makes it GREAT.

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