MiniTool Power Data Recovery - MiniTool Power Data Recovery is a freemium data recovery tool that works quite well considering the basic version is the only free aspect of the app.
Recuva - Accidentally deleted an important file? Lost files after a computer crash?
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
RS Photo Recovery - Recover lost and deleted photos!
PhotoRec - Jun 4, 2016 - PhotoRec is file data recovery software designed to recover lost files including video, documents and archives from hard disks, CD-ROMs, and lost pictures (thus the Photo Recovery name) from digital camera memory.
IObit Undelete - MacBooster 8, IObit official Mac app, helps you clean over 20 types of Mac junk files, easily free up Mac hard drive and make OS X run faster and secure your Mac OS X from Mac malware and Mac adware.