The Top 5 Open Source Content Management System

Open Source Content Management System(SMS) is a platform that provides the freedom to use their available resources and make their own website. This open-source platform provides the feasibility to modify your website as you want all the necessary tools are present in this platform. For managing websites, a dashboard is also available with different options which are necessary for website development.

Here are some of the most famous open source content management systems, which you can select according to your requirement. Each open-source CMS has some unique features.

WordPress CMS
When we talking about open source CMS it is not possible to ignore the world's most famous content management system is WordPress.
WordPress is an open-source content management system basically developed for blogging purposes on May 27, 2003. It is written in PHP and uses the Mysql database. According to Wikipedia WordPress was used by more than 23.3% of the top 10 million websites as of January 2015 and its market share is approximately 59.9%. Not any open source CMS is near this market share figure, you can imagine the importance of this open-source CMS.
License: GNU GPLv2

Joomla CMS
Joomla is an open-source content management system for publishing web content and is mostly used for mid-sized and e-commerce companies. It was initially released on 17 August 2005, it is written in PHP and uses the OOP technique and for data storage uses Mysql and PostgreSQL. Joomla has almost 7,700 free and commercial extensions are available. According to Wikipedia as of February 2014, Joomla has been downloaded over 50 million times, and its market share of approximately 8.3%, very less as compared to WordPress.
License: GNU General Public License

Drupal CMS
Drupal is an open-source content management system for enterprises or large-sized businesses such as corporate, political, and government sites. This framework is written in PHP and initially released in January 2001. It has more than 30,000 free community-contributed addons and its community member strength is more than one million members. The market share of Drupal is approximately 5.9% which is less than Joomla and WordPress.
License: GPLv2

CMS Made Simple
CMS Made Simple is an open-source content management system it allows user to create website content easily and fastly. This open-source CMS is can be used for small, medium, and large-sized organizations. It is written in PHP and supported Mysql database for storage.
The aim of CMS Made Simple is to provide a platform that is easily customizable with themes, addon, tags, dynamic, and translations. The stable version of CMS Made Simple was released in Nov 2013.
License: GNU General Public License

Contao CMS
Contao is a free and open-source content management system for medium to large websites. This open-source is accessible for developers and as well as for users and this software is easy to maintain. This platform provides high-security standards and develops a website that is SEO-friendly. Initially, it was released in June 2006
License: GNU LGPL