WordPress lets you create beautiful and powerful websites or blogs. WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. Features include a plugin architecture and a template system.
WordPress was used by more than 23.3% of the top 10 million websites as of January 2015. WordPress is the most popular blogging system in use on the Web, at more than 60 million websites. WordPress is optimized for SEO and getting your site in front of searchers on Google, Bing, Yahoo, and others. Customization is incredibly easy.
The site can be easily customized as per growing requirements. Therefore reorganizing your site can be done at any point of time without the fear of complication. Wordpress is popular for the fact that it is incredibly easy to use. A website developed using this simple CMS can get extensively powerful by integrating it’s abundantly available plug-ins. Wordpress’s extensive web library has thousands of attractive templates and exclusive plug-ins that can create magic to any website. A simple theme can be customized and any functionality can be incorporated to bring out a terrific website.

Joomla is a free and open-source content management system (CMS) for publishing web content. It is built on a model–view–controller web application framework that can be used independently of the CMS. Joomla is written in PHP, uses object-oriented programming (OOP) techniques and software design patterns, stores data in a MySQL, MS SQL, or PostgreSQL database, and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, search, and support for language internationalization.
Drupal is a open-source content-management framework written in PHP and distributed under the GNU General Public License. It is used as a back-end framework for at least 2.1% of all Web sites worldwide ranging from personal blogs to corporate, political, and government sites. It is also used for knowledge management and business collaboration.