Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
snaprd - Snaprd is a program that helps you to make snapshot backups using rsync.
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.
SyncBack - Backup software for the PC: powerful, easy to use solution for backing up and synchronising files on a local/network drive, the cloud, FTP server and more.
Time Machine - Time Machine is the breakthrough automatic backup that’s built right into Mac OS X.
Backup Maker - BackUp Maker is the professional solution for creation of data-backups.