[Nova]

My favorite forum script is myBB. Its very easy to install and configure. I like the interface of myBB better than SMF or phpBB. Installing plugins is simple and we dont have to mess with core files. I think its becoming the most popular free forum script passing SMF and phpBB.

Downside of myBB is lack of free themes and plugins. There are plenty of premium themes and plugins out there though. I have been searching for a good free responsive myBB theme for a while now.