Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
Acronis Cyber Protect Home Office - (Formerly Acronis True Image) Complete protection for your digital life
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Win32 Disk Imager - Create and restore image backups of disk drives.
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.