WordPress (lastest version: 3.4)

WordPress was born out of a desire for an elegant, well-architectured personal publishing system built on PHP and MySQL and licensed under the GPL. It is the official successor of b2/cafelog. WordPress is fresh software, but its roots and development go back to 2001. It is a mature and stable product. We hope by focusing on web standards and user experience we can create a tool different from anything else out there.

WordPress is a powerful content management system, and it comes with a great set of features designed to make your experience as a publisher on the Internet as easy, pleasant and appealing as possible. We are proud to offer you a freely distributed, standards-compliant, fast, light and free personal publishing platform, with sensible default settings and features, and an extremely customizable core.

Rate: 5/5

Demo: http://demo.opensourcecms.com/wordpress/

Download the lastest version: http://wordpress.org/download/

or download old versions: http://wordpress.org/download/release-archive/

To install your website or blog with WordPress, you can see my category "Install CMS", i think it is very useful.

Warning: There are many plugin for WordPress, but some of them have dangerous vulnerabilities (hacker can use vulns to destroy your website). You should check the security for any plugin you want to use (see my "CMS security" category).