Zen Cart

http://www.zen-cart.com/

Zen Cart® truly is the art of e-commerce; free, user-friendly, open source shopping cart software. The ecommerce web site design program is 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.

Zen Cart sites showcase, 5025 sites using Zen Cart