Plouplou

PHPBB3 is the best free forum script you will get vBulletin is abviously excellent but pricey MyBB and SMF are also good but arent much customizable and lack some essential features Demo : free forum hosting

The best forum software is definately, without a doubt invisionboard. Costly yes but when you have it it is spectacular. If you want to see a "preview" visit this free forum hosting

I currently use PHPBB3 with my halo 2 clan forums. I have no complaints at all. The theme was easy to install, The admin panel is straight forward and easy to navigate. I highly suggest PHPBB3. edit by redbullmarky: link deleted as seemed like more of a cheeky advert, to me. If anyone wants to try out phpBB, go here