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 * [Duplicity](http://duplicity.nongnu.org/) - Encrypted bandwidth-efficient backup using the rsync algorithm.
 * [Elkarbackup](https://github.com/elkarbackup/elkarbackup) - Backup solution based on RSnapshot with a simple web interface
 * [Lsyncd](https://github.com/axkibe/lsyncd) - File Monitor which spawns a process to synchronize the changes (rsync by default).
+* [Obnam](http://obnam.org/) - An easy, secure, snapshots-based backup program with data de-duplication.
+* [Rdiff-backup](http://www.nongnu.org/rdiff-backup/) - An easy A remote incremental backup of all your files.
 * [Rsnapshot](http://www.rsnapshot.org/) - Filesystem Snapshotting Utility.
 * [Snebu](http://www.snebu.com/) – Snapshot backup with global multi-client deduplication and transparent compression.
 * [UrBackup](http://www.urbackup.org/) - Another client-server backup system.