WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
SynciOS Data Recovery - Best iPhone data recovery software retrieves lost or deleted data like contact, whatsapp, message, photos, video for iPhone 6 Plus/6/5s/5/4S/4, New iPad, iPod Touch.
TreeSize - TreeSize tells you where precious disk space has gone to.
Amrev - Amrev is a simple yet robust Data Recovery Solution developed for Mac and Windows OS.
SpaceSniffer - SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.
Jihosoft Android Phone Recovery - A Powerful Android Recovery Tool to Recover Deleted/Lost SMS, Contacts, Photos, WhatsApp, etc.