Recuva - Accidentally deleted an important file? Lost files after a computer crash?
DiskPatch - Did the entire hard disk go blank? Does Windows complain that the volume needs to be formatted?
SaveMyBits - Do you think your data is lost?
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
Free Data Recovery Mate - Free File Data Recovery Software provides 4 recover modes
DiskGenius - DiskGenius provides an all-in-one solution for data recovery, disk partition management and backup & restore for Windows PCs, Servers and workstations.