yabb- a *free* forum based on (wat eles?) ubb, not really stable, only thing i like about it is in the user profile u can select to not be able to view other peoples sigs and avatars
vB- a forum u pay for based on (wat eles?) ubb. lots of fetures stolen for ubb dev teams ;P. very messy cp. infact took me a hour once to find something in it while foolin in anthor sites cp
(dont ask me y ^_-)
ubb-a forum based on, o wait the others are based on this one. stock forum is ok, lots of hacks, good suporting dev teams, stable, easy to set up
....i hate vB ;P *waits for this post to be closed*