osCommerce Online Merchant‘s success is thanks to its dedicated team that focus on the core features which in turn is re-enforced by an active community of store owners, developers, and service providers that focus on additional features. To date, osCommerce has been the inspiration behind other open source shopping cart solution such as Zen Cart. The osCommerce community has provided over 7,000 add-ons that extend on the core feature set of osCommerce Online Merchant to meet the individual requirements of store owners. And did we mention all of this is available for free.
The add-on categories include:
» Features
» Images
» InfoBoxes
» Languages
» Order Total Modules
» Payment Modules
» Reports
» Shipping Modules
» Templates and Themes
» Zones
» Other
osCommerce Online Merchant is built using the PHP scriping language and uses a MySQL database server for the online store data. The combination of PHP and MySQL allows osCommerce Online Merchant to run on any webserver environment that supports PHP and MySQL, which includes Linux, Solaris, BSD, Mac OS X, and Microsoft Windows environments.
osCommerce started in March 2000 and has since matured to a solution that is powering many hundreds and thousands of live shops around the world.
You can find out more about and download osCommerce at: http://www.oscommerce.com
Zen Cart is a popular free, user-friendly, open source shopping cart software. The ecommerce web site design program has been developed as a fork from 
Regularly updated by the core development team and with contributions from 100’s of developers worldwide it is a good choice for anyone wanting to run an online business. Other shopping cart software programs can be difficult to install and use without an IT degree, Zen Cart® can be installed and set-up by anyone with the most basic web site building and computer skills. Having said that it can be difficult and time consuming to customise.
More Information and downloads at: