DiskSpy is used to view single hard disk sectors and offers access to every sector of a hard disk drive. It has special features like text and pattern search, 8-, 16- and 32-bit display modes as well as big- and little-endian notation.
The Free Edition of HDClone is the ideal tool for cloning, migrating and imaging contents of internal/mobile hard disks, SSD and USB media. Since it works on physical level, it can be used with any operating system and any filesystem.
PCISniffer performs a complete PCI-diagnosis. It reports device and vendor names as well as other PCI device information in plain text. This information can also be transmitted over a serial port. ISO image for making a bootable CD included.
The Free Edition of HDShredder is the ideal tool for erasing entire hard disks and other media. HDShredder works independent of partition layout, file system, and operating system.