backstep.py is a backup program that can be run in a directory. It makes a snapshot backup of the directory in a specified interval. The system backs up every file that has changed or was created in the specified interval. The user can restore a backup by telling the system to restore a backup that is a given amount of time old.
rocknroll (Rsync fOr baCKup and Roll) is an incremental backup maker based on rsync. It backs up a remote directory tree to a destination directory on the local host. For this backup, it manages a set of archives named tag.1, tag.2, etc. Using the famous "link-dest" option of rsync, it keeps only the difference between the different archives.
CryptBackup is an encrypted backup application for Linux desktop users. It allows even a layperson to backup their home directory (including the desktop) on an encrypted external device with just a few clicks. Even the setup is only to choose the external device (such as an external hard drive) and to set a password.
Redo Backup and Recovery is an extremely easy point-and-click rescue live CD with a suite of tools for system backup and recovery, partition editing, deleted file recovery, drive management, data protection, and more. The backup tool stores an image of the entire hard drive, so recovery from viruses, malware, or disc failures takes minutes. It boots from a CD or USB drive. It automatically locates local drives, USB drives, and network-shared drives to make backup storage and retrieval as simple as possible for anyone. The menu-driven GUI includes a Web browser for downloading drivers and a terminal with advanced command line tools.
Libchop is a set of utilities and library for data backup and distributed storage. Its main application is chop-backup, an encrypted backup program that supports data integrity checks, versioning at little cost, distribution among several sites, selective sharing of stored data, adaptive compression, and more. The library itself, which chop-backup builds upon, implements storage techniques such as content-based addressing, content hash keys, Merkle trees, similarity detection, and lossless compression. It makes it easy to combine them in different ways. The ‘chop-archiver’ and ‘chop-block-server’ tools, illustrated in the manual, provide direct access to these facilities from the command line. It is written in C and has Guile (Scheme) bindings.
AllWorldIT DBackup is a backup system which creates one archive per directory it backs up. This makes searching through the backup much easier, as you can look for which files you're after in the directory hierarchy. It will only back up directories which have changed, which makes it rsync friendly.
BakAndImgCD is a small Linux-based operating system which has been designed to perform the two tasks: data backup (with support for btrfs, ext2, ext3, ext4, FAT, HFS, HFS+, jfs, Minix, NTFS, ReiserFS, and XFS) and disk imaging (using Partimage, Partclone, and GNU ddrescue). The output files (archives and images) can be optionally compressed and sent to a remote FTP sever via Ethernet, WiFi, or dial-up. It is fully compatible with UNetbootin, which can be used to create an easy-to-use live USB.