1. Backupninja

... format. Backupninja provides a centralized way to configure and schedule many different backup utilities. It allows for secure, remote, incremental filesytem backup (via rdiff-backup), compressed ...

2. 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 ...