EFBUZZARD  My biggest regret in switching to Leopard is the loss of this utility. If you are running Tiger, don't hesitate to use it. I can't understand why these features aren't part of OSX, and I hope the developer will make this Leopard compatible ASAP!  
(Version 1.5.1)

EFBUZZARD  This scanning software still works even under Leopard 10.5.2 on an Intel MacMini 1.83.

I bought the AGFA 121u scanner I am using it for with the very first "bondi" iMac (revA) now 10 years ago in 1998. Just about every other scanner software has come and gone, but THIS ONE still works. Kudos to Agfa - Umax, Canon, and EPson should all take a lesson from this.   
(Version 2.1fc2)