DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
CleanMyMac X - Clean, protect and speed up your Mac
EaseUS Data Recovery Wizard - Advanced data recovery software to do format recovery, unformat and recover deleted files emptied...
MacFly Pro - Smart assistant for better Mac performance
Recuva - Accidentally deleted an important file? Lost files after a computer crash?