Coppermine is top-rated free image gallery, written in PHP. I just installed it and had very little trouble getting it up and running.
It would be great if there were a bridge that allowed members of a UBB.c forum to login to that site's Coppermine gallery using their same login information.
I know a bridge already exists for phpBB, YaBB SE, and vbulletin. Perhaps one of these bridges could be modified to work with UBB.c?
If only I knew more perl and php, I'd do it myself!