Best tool for creating forums

Hi,
Best paid Online Forum Platforms-

vBulletin

vBulletin (vB) is a popular premium Internet forum software on the web, and the choice of many big websites. Some of its built-in applications include discussion and forum, photo albums, groups, calendar, events management, polls, blog and more. There are three versions for you to choose: publishing suite, forum classic and mobile suite, with different costing, depending on your needs.
Woltlab Burning Board
WoltLab Burning Board is a fast and reliable forum software solution for your internet site. It has three premium versions you can choose: Burning Board, Burning Board Lite and Community Framework, with many plugins to extend your online community.
Best Free Online Forum Platforms
phpBB
phpBB is a free and open source forum bulletin board software that can be used to stay in touch with a group of people or can power your entire website. Its extensive database of user-created modifications and styles contains hundreds of style and image packages to customise your board.
Simple Machines Forum
Simple Machines Forum is a free, professional grade software package that allows you to set up your own online community within minutes. Its custom made template engine puts you in full control of the layout of your message board and lets your forum interact with each other. SMF is written in PHP and uses a MySQL database. It is designed to provide you with all the features you need from a bulletin board.

There is more but I think you will find one among those,just go and see for yourself ,
Hope this helped

All the BEST