Best forum software?

[priyanka-m6.net]

Hi guys,
Out of the following,which forum software is most popular and what features makes it popular?
1.vBulletin
2.SMF
3.Invision Power Board
4.phpBB


Apart from above, are there any other good forum softwares?

[Novell52]

vBulletin - no question about it.

[ST_Admin]

I'd say vBulletin. So many forums run it.