WordPress is open source blogging tool and a content management system (CMS) based on PHP and MySQL which runs on a web hosting service. Features include a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internets top 1 million websites,[when?] and as of August 2011 manages 22% of all new websites. WordPress is currently the most popular blogging system in use on the Web, powering over 60 million websites worldwide.
It was first released on May 27, 2003, by founders Matt Mullenweg and Mike Little as a fork of b2/cafelog. As of April 2013, version 3.5 had been downloaded over 18 million times.