WordPress is a free and open source blogging tool and a content management system (CMS) based on PHP and MySQL. Features include a plugin architecture and a template system. WordPress was used by more than 23.2% of the top 10 million websites as of August 2013. WordPress is the most popular blogging system in use on the Web,at more than 60 million websites.

Founders: Matt Mullenweg and Mike Little,

Developers:    WordPress Foundation

Headquarters:    San Francisco, California

Initial release    May 27, 2003; 11 years ago[1]

Development status    Active

Type: Blog software

Website: wordpress.org.