ONERECOVERY is the best data&photo recovery software for Windows PCs and Macs. It can recover over 1000 file types and bring your lost data back due to various situations like accidental deletion, formatting, virus attack and more...
SquirrelDisk - Discover what files are taking up your hard disks.
ncdu - A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...
CleanMyMac X - Clean, protect and speed up your Mac
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Filelight - Filelight is an application to visualize the disk usage on your computer.