Recuva - Accidentally deleted an important file? Lost files after a computer crash?
Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
iHex - iHex is the premier hex editor and data analysis tool for Mac OS X.
EaseUS Data Recovery Wizard - Advanced data recovery software to do format recovery, unformat and recover deleted files emptied...
HextEdit - HextEdit is a proficient hex editor and disassembler for Mac.