The Best Free PHP Forum Software !!

Hi All ! I want to know your reviews regarding Free Forum Softwares which are developed using PHP-MySQL. Which Forum Software is the best and why ? Like I have studied PhpBB is one of the fastest and free forum softwares whereas SMF is one of the most flexible of all and there is one forum AEF which is offering each and everything like vBulletin Boards(Paid), but it is hard-coded and difficult to customize.

Which Free Forum software is the best and why ?

 

Joomla also has many forum extensions and Joomla is written in PHP and uses MySQL as a database.

 

SMF, PHPBB and MyBB. All are free and good but if you are looking for lightweight but still secure, I think FluxBB is also a good one.