VirtueMart is an Open Source E-Commerce solution to be used together with a Content Management System (CMS) called Joomla! (and Mambo). Joomla! and VirtueMart are written in PHP and made easy for use in a PHP/MySQL environment.
All you need is to download the latest Joomla distribution from www.joomla.org and the VirtueMart package from this site. Joomla provides the Core System and the Framework, which VirtueMart can use. So you can easily use a complete Shopping Cart Solution within your own dynamic Website (”Portal”), together with many other Plug-Ins, called Components and Modules, like Forums, FAQ, Guestbooks and Galleries.
VirtueMart is free software released under the GNU General Public License. No limitations exist for VirtueMart. You can create and maintain a site with an unlimited number of categories, products, orders, customers, etc.