I don't know all of them, but I know some. * zbackup: Appears to be unmaintained, superseded by attic/borg. * attic: deduplicating backup repository. Doesn't

I don't know all of them, but I know some. * zbackup: Appears to be unmaintained, superseded by attic/borg. * attic: deduplicating backup repository. Doesn't seem actively maintained anymore either. * borg: deduplicating backup repository. I used this recently. It's cool, but the performance is disappointing. It's single-threaded. I got into the GitHub a little bit and they seem committed to their current way of doing things, which makes it hard for an external multithreaded compressor to take over (everything is processed in 2 MB chunks). * rclone: Meant to provide an rsync-like interface to any cloud backend * duplicity: Automatically performs encrypted, compressed delta-enabled backups, but requires some upfront configuration. Been using this for years. * rdiff-backup: Haven't used, but it seems more like an ad-hoc backup utility for "I want to keep an old version of this folder". Duplicity seems like a better choice for disk-scale backups.