osCommerce is an online e-commerce solution empowers store owners to setup, run, and maintain their online stores with minimum effort and with absolutely no costs or license fees involved.
 

Customer Features:

• Customer accounts
• Customer address books (other shipping destinations)
• Order history
• Temporary (not logged on) and permanent (logged on) shopping carts
• Search catalog for products or manufacturers
• Product reviews by customers
• E-mail notifications
• Forseen checkout procedure
• Secure transactions with SSL
• Number of products in each category are shown
• Bestseller lists
• Display what other customers have purchased (relating to the current product displayed)

Administrative Features:

• New design for user-friendliness
• Add/Edit/Remove categories, products, manufacturers, customers, and reviews
• Categories-to-categories structure
• Statistics for products and customers
• Dynamic product attributes
• Tax zones, classes, and rates
• Configuration parameters in database for remote editing
• Not tied together with the catalog module (admin module can be installed on another server)
• Payment and shipping modules
• Connection to oanda.com's currency exchange rate servers for multi-currency shops
• Decide what to display (and the order) in the product listings
• Backup tool

General Features:

• PHP3/PHP4 compatible
• Out-of-the-box functionality
• Localization: English, German, and Spanish

Payment Gateways: