TestDisk and PhotoRec (64-bit)

From CG Security:

TestDisk is a powerful data recovery utility. It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally erasing your Partition Table). PhotoRec is file data recovery software designed to recover lost pictures or lost files from digital camera memory (CompactFlash, Memory Stick, SecureDigital, SmartMedia, Microdrive, MMC, USB Memory Drives), even Hard Disks and CDRom. PhotoRec is safe to use, it will never attempt to write to the drive or memory support you are about to recover from. Recovered files are instead written in the directory from where you are running the PhotoRec program.