HDD Low Level Format Tool is a freeware utility for low-level hard disk drive formatting. This small program will erase, Low-Level Format and re-certify a SATA, IDE or SCSI hard disk drive. Will work with USB and FIREWIRE external drive enclosures. Low-level formatting of Flash Cards is supported too. Low Level Format Tool will clear partitions, MBR, and every bit of user data
License terms:
Free for personal use (speed is capped at 180 GB per hour which is 50 MB/s)
Just $3.30 for personal use (no speed limit)
$27.00 per seat for commercial or professional use
Alternate File Shredder will permanently delete files and folders, including the added ability to overwrite the free space on a drive, preventing already deleted files from being restored.