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.
Acronis Cyber Protect Home Office - (Formerly Acronis True Image) Complete protection for your digital life
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
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.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.