Forum / WIki software for web servers

[SoulinEther]

Hey, was wondering what are some good forum and wiki software that you have used? I prefer them to be FLOSS, and they must be gratis. I prefer PHP over anything else... but...

I was thinking of ... MoinMoin, though it uses Python and a flat-file interface. And for the forum software, was considering Simple Machines.

[matthinckley]

I like Simple Machines a lot.. have been using it for almost 3 years now..

I haven't used any wiki software.. can't help you there

[afljafa]

WakkoWiki - SQL data base. Nice and simple.

[DeadSuperHero]

I'm still looking for a good CMS for my own site. I've never really used wikis.
However, I really do like SMF.
While were talking about the web, can anyone reccommend a good CMS system, with some good themes? Joomla and Xoops are great, but they don't have enough themes!

[sk8dork]

i've heard a lot of people recommend punBB (http://www.punbb.org), and i currently am using smf (http://www.simplemachines.org). phpBB has only brought me bad experiences, but some people still recommend it.

that said i'd like to get more opinions on these and other options.