In previous post, you have been knew about Magento – eCommerce Software for Growth. Today, you will be find other good eCommerce Softwares.
Zen Cart is an open source online store management system. It is PHP-based, using a MySQL database and HTML components. Support is provided for several languages and currencies, and it is freely available under the GNU General Public License.

Zen Cart branched from osCommerce as a separate project. Beyond some aesthetic changes, the major differences between the two systems come from Zen Cart's architectural changes(e.g. a template system) and additional included features in the core. Among the modules already included are a Gift Certificate/Voucher module which allows to create, send and manage the digital coupons. A module to sell downloads(pdf or other media files) is included as well.

Magento is an Open Source ecommerce web application launched on March 31, 2008. It was created by Varien, building on components of the Zend Framework.
Magento is available under the Open Software License version 3.0. Since version 1.1.7 some parts are licensed under the Academic Free License version 3.0.
Magento Enterprise Edition, a paid for version of Magento aimed at larger companies, was launched on April 15, 2009.
Magento supports installation of modules through a web based interface accessible through the administration area of a Magento installation. Modules are hosted on the Magento eCommerce website as a PEAR server. Any community member can upload a module through the website and is made available once confirmed by a member of the Magento team. Modules are installed by entering a module key, available on the module page, into the web based interface.