Joomla is a content management system (CMS), which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available.

Magento is a feature-rich eCommerce platform built on open-source technology that provides online merchants with unprecedented flexibility and control over the look, content and functionality of their eCommerce store.

Drupal is a content management system that makes use of modules to allow site administrators to organize and display content, customize appearance and manage routine tasks,

osCommerce is an open source online shop e-commerce solution that allows store owners to setup, run, and maintain online stores with minimum effort and with no costs, fees, or limitations involved.

WordPress is an open source blog publishing application.it provides integrated link management, search engine-friendly, ability to assign nested categories to articles , multiple author capability and support for tagging of articles.