WordPress is a free and open source blogging tool and a content-management system (CMS) based on PHP and MySQL.
MyBB, originally MyBulletinBoard, is a free and open source forum software which is developed by the MyBB Group. It is written in PHP, supports MySQL, PostgreSQL and SQLite as database systems and has database failover support. It is licensed under the LGPL.
phpBB is an Internet forum package written in the PHP scripting language. The name "phpBB" is an abbreviation of PHP Bulletin Board. Available under the GNU General Public License, phpBB is free and open source software.
Invision Power Board (abbreviated IPB, IP.Board or IP Board) is an Internet forum software produced by Invision Power Services, Inc. It is written in PHP and primarily uses MySQL as a database management system, although support for other database engines is available.
XenForo is a commercial Internet forum software package written in the PHP programming language using the Zend Framework
vBulletin (vB) is a proprietary Internet forum software produced by Jelsoft Enterprises and vBulletin Solutions, both subsidiaries of Internet Brands. It is written in PHP and uses a MySQL database server.
We will be adding many more software's pretty soon so stay tuned.