Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.
Cubic - Cubic (Custom Ubuntu ISO Creator) is a GUI wizard to create a customized bootable Ubuntu Live CD...
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Customizer - Ubuntu Live CD remastering tool.
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.
Linux Live Kit - Linux Live Kit the ultimate way to bring your linux to life. Create your own live distribution