FUDforum is PHP & MySQL forum with many customizable features. The forum supports both threaded & flat views, contains an integrated spell checker for messages,
includes a private messaging system and many other features. From the admin side, FUDforum has a number of control panels allowing the administrators to easily administer the
forum as well as change the settings. The layout of the forum is very flexible allowing for multiple layout and has easy CSS editor for quick layout modifications.
A little to big to paste source, you can download tar ball here: http:/fud.prohost.org/download.php