osCommerce Summary osCommerce is an online shop solution that offers a wide range of out-of-the-box features that allows online stores to be setup fairly quickly with ease,  and is available for free as an open source based solution released under the GNU General Public License. Features Customer Functionality, as of Preview Release 2.1 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 Functionality, as of Preview Release 2.1 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 Functionality, as of Preview Release 2.1 PHP3/PHP4 compatible Out-of-the-box functionality Becoming modular Localization: English, German, and Spanish; plus contributions