1)   Shop-Script FREE 1.1
Free PHP / MySQL shopping cart software and ecommerce solution Shop-Script FREE. 100% open source, template based design, easy and quick installation. Features include: products catalog, shopping cart, ordering system, user friendly admin panel,

 2)   VPASP Shopping Cart - Free Starter Pack 6.09
Sell your products online with FREE shopping cart software that adapts to any business. Our open source system comes standard with credit card validation, site search, unlimited product catalog and a content management system to boost your website!

 3)   Ecommerce Shopping Cart: CRE Loaded TM 6.2.11
Shopping Cart Software, Online E-commerce store, Supported, Customizable. Includes Payment, Shipping and Marketing tools; Admin Access Levels, Multiple Product Images, Order Status Control and More. Backed by fulltime CRE Loaded(TM) Professionals.