Apps with 'Repair Partitions' feature

Free command-line tool for recovering lost partitions, repairing non-booting disks, supporting multiple file systems and converting disks to basic format.

SystemRescue is a Linux system rescue toolkit available as a bootable medium for administrating or repairing your system and data after a crash.

DiskWarrior is the safest, most technologically advanced, most powerful utility to eliminate directory damage and recover your files, folders and documents. DiskWarrior is so advanced it can even recover your data from a failing hard drive.

Active@ File Recovery recovers data as a result of having been accidentally deleted, formatted or otherwise lost, includes a Partition Recovery tool.

diskpart is a command-line hard disk partitioning utility included in versions of the Windows NT operating system line from Windows 2000 onwards, replacing fdisk which was used in MS-DOS based operating systems.