I used to use phpBB....
PhpBB used to be king of the free forums out there. But it's become so dated. It used to be that you couldn't even do sub-categories without the CH mod, which heavily edited the forum coding (it was worth it), making it, for all intensive purposes... incompatible with most mods.
Sure you could edit them to work... but the problem is (and keep in mind that I'm comfortable with code) that the files your given that tell you which modifications to make aren't at all commented well. All they do is say "find this, insert this before that" extra. They don't tell you what part of the code does what. This is a problem because they assume that your running a stock install. Which means after several modifications, especially huge ones like CH, the code has changed so much that the install guides aren't very helpfull at all.
So I'd always have to figure it out myself. I could always get it working eventually but it took more time than it should have and most people would be SOL.
I can't say I hate phpBB, I've used it for many years and it really did pave the way for later forum software.
I here that despite PhpBB3 being out, you still need a mod for subforums.
They really messed up when moving to PhpBB3, what did it really bring? Everybody who had spend all the time getting there mods to work wasn't about to start all over again, especially when the mods for phpBB3 were/are sparse.
That's when allot of people switched, I honestly think much of the momentum for the project has gone. It's interesting to because Open Source projects tend to be superior to commercial ones allot of the time and tend to have more efficient and customizable code.
This isn't true of forum software, with the best software being vBulletin IMO (not that others don't come close). It's also the most expensive by far, ridiculous in price.
What do I use?
MyBB, which I think is the best free alternative.
Pros
- supports things like multi-layered sub forums, Portal, RSS, and a few other things from the get-go.
- Advanced plug-in system that uses hooks to insert plug-in code. Makes removing or disabling plugins as easy as clicking "deactivate" or "uninstall". Also, debugging mode.
- The C-Panel is much more powerful than phpBB or any other free forum I've ever seen, and is even comparable to vBullitins.
- Easy yet powerful template and theme editor.
-Open Source
- Much more, but I'll stop here
Cons
-One of the lessor known projects, there could be more mods readily available, that said, there are some amazing mods. This also goes for themes.
- No Gallery plug-in yet.
Heres an example:
http://www.dracojesi.com/Forum
Also, one last thing, you can use easymod to auto-install mods on PhpBB but it's more miss than hit and often leaves you with a mess to clean up, even with the easymod "compatible" mods