MyBB

[ZeroX]

IPB I think is the best out there. You can get a open source IPB 1.3 for free from http://www.invisionfree.com

[Sidoh]

I've been active on a few forums that use IPB, but I think I like SMF more.

[Blaze]

I really don't like IPB.  I don't know what's wrong with it, though... I think it's because the free forums they host with their software are full of everything that's wrong with the internet.

[rabbit]

SMF is by far my favorite.  YaBB works, I guess, and vBulletin is pretty.  PunBB and IPB just anger me.

[Chavo]

You don't HAVE to use php to build a free, quality forum/community ;)

www.communityserver.org

[Blaze]

You don't HAVE to use php to build a free, quality forum/community ;)

www.communityserver.org

I don't know ASP.  I'll stick with php.

[Sidoh]

You don't HAVE to use php to build a free, quality forum/community ;)

www.communityserver.org

I don't see any remark here that implies that...

[Chavo]

I wasn't suggesting anyone did ;)

[iago]

You can build a community with MySpace, but that doesn't make it a good thing! :)

[Warrior]

ASP .NET rox.