phpBB is a forum software for creating online communities. It is free and licensed under GNU GPL license and written in PHP web programming language. Currently is the most popular free forum solution software and competes with popular products like vbulletin (commercial), simple machines (free), mybb and others.
phpbb was designed to allow new features to be added without altering core code. This is done via modifications (mods) that extend the functionality of phpBB. Design is separated from code and it allows you to easily change the look of your forum via phpbb style manager. There are thousands of free templates and modifications available.
To run a phpbb forum you will need a web server with PHP and MySQL (other database systems are supported too: postgresql, ms sql, oracle and others) installed. PHP and MySQL are the most common on shared hosting platforms.
Justhost phpBB
Justhost account is setup perfectly so you can run phpBB without any problems. You even don’t need to upload any files or create databases, but use Fantastico to install phpBB in 3 steps. I recommend justhost as phpBB host.