WordPress is a blogging and content management tool. Wordpress is used by more 23% of the top 10 million websites as of January 2015 and has been declared the most popular blogging system on the web with over 60 million websites. It is an open source piece of software which is licensed from the Free Software Foundation.
Wordpress's origins started as project called b2/cafelog which was estimated to have been installed on 2000 blogs as of 2003. The project then developed into Wordpress and first appeared in 2003. The blogging site started as a joint project between Matt Mullenweg and Mike Little. The name was suggested by a friend of Mullenweg