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.
SaveMyBits - Do you think your data is lost?
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.
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
321Soft Data Recovery for Mac - The ultimate Mac Data Recovery software with RAID supported.