BCWipe Total WipeOut

From Jetico:

BCWipe Total WipeOutTM is a software utility that securely and permanently erases all data from the entire hard drive, including boot records and operating system files. When files are deleted normally from a disk on your computer, the operating system does not actually erase contents of these files from the disk. It deletes 'references' on these files from file system tables. Contents of the deleted file continue to be stored on the disk and can be easily recovered using any undelete utility.

BCWipe Total WipeOut utility is designed for high-security environments to safely eliminate all contents of hard drives before computers are retired or removed from the premises. BCWipe Total WipeOut is a powerful software utility designed to quickly and efficiently wipe disks on large number of computers without wasting time.