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.
Acronis True Image - Full Image Backup, Cloning & Data Protection for Windows & Mac.
DriveImage XML - DriveImage XML is an easy to use backup and restore program for Windows XP and Vista. Part of Runtime's Data Recovery Software products.
rsync - rsync is a software application for Unix which synchronizes files and directories from one location...
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.