Recuva - Accidentally deleted an important file? Lost files after a computer crash?
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.
JpegDigger - JpegDigger is designed for recovering deleted photos from memory cards but it works on hard drives...
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.
myPhoto Recovery - myPhoto Recovery is a utility for recovery of lost and deleted photos.
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.