osCommerce is a powerful open source online shopping cart script that is versatile and continually updated. Using this software you can set up and operate an online store. This script handles everything from inventory management to payment processing. It has large number of features that you can easily enable and configure. With osCommerce shopping cart you can add multiple products on your site, organize them in categories, set discounts and special promotions. osCommerce allows you to set your prices in different currencies and accept all popular payment methods: PayPal, credit cards, cheques. osCommerce has a built-in shipping and tax functionality. It 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.
This script is built to run on both Windows and Linux servers. The only requirements are that the server must have PHP installed and must have access to a mySQL database server. In order to install osCommerce in your hosting account you need access via FTP to upload the files and access to the mySQL database server in order to create a database to be populated by the installation script.
The osCommerce source code is available to anyone who wants to work on it. Any developer who wants to re-work, re-package, and re-sell it can do so. With osCommerce, a professional web developer can create a search engine friendly website. osCommerce is free, easy, fully functional script and maintaining a store is simple and efficient.