1. Backupninja

... rsync with hardlinking. Features Easy to read ini style configuration files. You can drop in scripts to handle new types of backups. Backup actions can be scheduled. You can choose when status ...

2. Duplicity

Duplicity backs directories by producing encrypted tar-format volumes and uploading them to a remote or local file server. Because duplicity uses librsync, the incremental archives are space efficient ...

3. Backup to Amazon S3 using Duplicity

... remote backups with it, and its package is existing in the Debian package repository. I looked into/around several open source backup applications: Bacula Zmanda rsync rdiff-backup duplicity ...