Deduplicating Archiver.
BorgBackup (short: Borg) is a deduplicating backup program. Optionally, it supports compression and authenticated encryption.
The main goal of Borg is to provide an efficient and secure way to backup data. The data deduplication technique used makes Borg suitable for daily backups since only changes are stored. The authenticated encryption technique makes it suitable for backups to not fully trusted targets.

Borg @ GitHub.

BorgBackup Web UI for your central repository server.
A fast and modern WebUI for a BorgBackup's central repository server.

BorgBackup @ GitHub

High performance self-hosted photo and video backup solution.
Self-hosted photo and video backup solution directly from your mobile phone.

Backup interface for volumes attached to containers.

Bivac allows to backup Container volumes using Restic.

MyDumper is a Logical Backup Tool. It has 2 tools:

• mydumper which is responsible to export a consistent backup
• myloader reads the backup from mydumper, connects the to destination database and imports the backup.

Both tools use multithreading capabilities

Client/Server Open Source Network Backup for Windows and Linux.
UrBackup is an easy to setup Open Source client/server backup system, that through a combination of image and file backups accomplishes both data safety and a fast restoration time.

Multiple backups of your footage, fast and easy.

Very efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images).

PING is a live Linux ISO, based on the excellent Linux From Scratch (LFS) documentation. It can be burnt on a CD and booted, or integrated into a PXE / RIS environment.

Several tools have been added and written, so to make this ISO the perfect choice to backup and restore whole partitions, an easy way. It sounds like Symantec Ghost(tm), but has even better features, and is totally free.

Backup Checker is a fully automated backup checker

Almir is a bacula web interface for administrators written in Python. It is designed with simplicity in mind, although backup management is never simple.

Backupninja allows you to coordinate system backup by dropping a few simple configuration files into /etc/backup.d/. Most programs you might use for making backups don't have their own configuration file 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 incremental data, backup system and hardware info, encrypted remote backups (via duplicity), safe backup of MySQL/PostgreSQL databases, subversion or trac repositories, burn CD/DVDs or create ISOs, incremental rsync with hardlinking.

AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup solution that allows the IT administrator to set up a single master backup server to back up multiple hosts over network to tape drives/changers or disks or optical media. Amanda uses native utilities and formats (e.g. dump and/or GNU tar) and can back up a large number of servers and workstations running multiple versions of Linux or Unix. Amanda uses a native Windows client to back up Microsoft Windows desktops and servers.