There are several options available when it comes to choosing the right e-commerce software for creating your online shop. From free shopping cart solutions to those who charge you some fees for keeping your shop online, there are actually hundred of shopping cart solutions available out there.
Unless the online store is only a small component of your website you should go with an open source e-commerce platform such as Zen cart, osCommerce, X-cart, Magento and etc.

osCommerce is an open source eCommerce solution written in PHP/MySQL based that offers a wide range of out-of-box features that allows e-stores to be setup fairly quickly with no efforts, and is available for free under GNU General Public License. This platform remains one of the most popular Open Source eCommerce engines for a start of online business. The success of osCommerce is secured by a great and active community where members help each other and participate in the development of extensions. Distributed under the GNU General Public License, osCommerce is one of the earliest PHP based Open Source shopping cart software distributions. As such, it has spawned a number of forks including ZenCart, and Batavi

Here are some of the main features of osCommerce and all features enabled by default for a complete out-of-the-box solution
Object oriented backend
Multilingual support (English, German, and Spanish provided by default)
Template structure implementation to: allow layout changes to be adaptive, easy, and quickly to make
allow easy integration into an existing site
Support for dynamic images
Supports unlimited products and categories and more.

Zen Cart is an Open Source eCommerce application written in PHP, uses HTML components and a MySQL database. Zen Cart is free, user-friendly, full-featured shopping cart for the sale of  both physical and downloadable products. This shopping cart developed from osCommerce and separated as an independent project in 2003

The main features of Zen Cart are:
Support unlimited products
extensive product management tools
support of multiple languages and currencies
multiple payment, shipping and tax option modules installed by default
wide variety of options for sales, specials, coupons and discounts
in-built customer communication and marketing tools, and
A template system that gives you complete control over your online store’s look and feel as well as product catalogue and shopping cart functionality.
Modules that you can add to increase functionality to both the storefront and the admin panel.

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