DiskWarrior - DiskWarrior, the world's most advanced and highest rated hard disk, hard drive, and disk repair and data recovery tool for macOS, OS X and Mac OS X.
Data Rescue - When Apple's system recovery fails, recover any and all files with Data Rescue 3. This data rescue software will even work if your Mac's hard drive fails to mount.
321Soft Data Recovery for Mac - The ultimate Mac Data Recovery software with RAID supported.
DriveDx - DriveDx is advanced drive health diagnostic and monitoring utility.
iBoysoft Data Recovery - iBoysoft Data Recovery for Windows serves as advanced data recovery software to assist users in file recovery from Recycle Bin, BitLocker-secured drives, RAW partitions, corrupted or formatted drives, deleted or lost partitions, etc. on Windows.
TechTool Pro - Techtool Pro is a robust hardware diagnostic tool available for Macintosh.