One of the most common questions we receive is What Is osCommerce? Oscommerce is a free, online shopping cart. It is one of the oldest open source shopping carts around and has always had the largest usage. The reason for that success is because of what are called "contributions" or "addons." These are code packages written for osCommerce that enhance its abilities in some way, like adding more images, or allowing text to be altered more easily. There are over 5,000 addons as of this writing and will continue to grow as more and more people use the oscommerce shopping cart and find new ways to do things. There are many other shopping carts around but none as popular or supported as osCommerce. In fact, many of them just wait for updates to the addons and then convert those to their shops. So if you are looking for a shopping cart, you might as well use the original and still the best.