Forum software that is designed, or is easilly integrated into a current webpage...

[Millenia]

I am looking for some forum software, preferably PHP coded, that can be very easily integrated into a current website layout. I have a 3 column website, the center column is where I would like the forum to go. Is there any software that can do this easily?

Any help is appreciated.

I heard SMF can do it via the layer system, but is there any software that is designed to do it?

[BabyJack]

I integrated myBB into my site very easily...