Recuva - Accidentally deleted an important file? Lost files after a computer crash?
RegCool - RegCool is an advanced registry editor.
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
Registrar Registry Manager - Advanced Registry Manager for Windows
EaseUS Data Recovery Wizard - Advanced data recovery software to do format recovery, unformat and recover deleted files emptied...
Regedit - The Microsoft Registry Editor (regedit.