There is the great Intech QuickBench:

http://www.intechusa.com/QBClassic.html

It´s part of the availaible "Hard Disk Speed Tools"

http://www.intechusa.com/HDInfo.html

OWC has a incredible cheap offer for HDST and CD/DVD Speed tools ($ 35 instead of $110). That suit is absolutely great (formatting FireWire drives, using HDs greater than 128 GB with onboard IDE controllers ...)

http://eshop.macsales.com/item/Intech%20Software/STCDHD/