Dar is a shell command that makes backup of a directory tree and files. Its features include splitting archives over several files, DVD, CD, ZIP, or floppies, compression, full or differential backups, strong encryption, proper saving and restoration of hard links, extended attributes, file forks, Door inodes, and sparse files, remote backup using pipes and external commands (such as ssh), and rearrangement of the "slices" of an existing archive. It can run commands between slices, before and after saving some defined files or directories (for a proper database backup, for example), and quickly retrieve individual files from differential and full backups. Several external GUIs exist as alternatives to its CLI interface, like kdar, DarGUI, SaraB, etc.
The ATA over Ethernet Tools are intended for use in conjunction with an ATA over Ethernet (AoE) driver for a Linux 2.6 kernel, called "aoe". The tools perform simple tasks like listing available devices, triggering device discovery, and restricting the network interfaces on which AoE is performed.
DiscSpan is a tool that will take that a large directory full of files and automatically burn a series of DVDs to near capacity, without the need or hassle of creating individual ISOs or moving files around. It is geared more towards smaller files such as music and photos, as it cannot span a file across multiple discs. It prompts for the directory you'd like to back up, the device to use to burn, and the speed at which to burn. It analyzes the files and calculates how many DVDs are needed, while making sure no files are greater than the size of a DVD.
Openduckbill is a simple command line backup tool for Linux. It is capable of monitoring files and directories marked for backup for any changes, and transferring these changes either to a local backup directory, a remote NFS exported partition, or a remote SSH server using rsync. It can either maintain an exact copy of the source at the backup destination, or maintain both current and previous versions of the source at the backup destination.
Clone2fs copies an ext2/ext3 file system to another volume or an image file. Unlike dd, clone2fs does not copy the whole volume but only blocks that are actually in use. Therefore, it is usually faster. It's also faster than dump/restore, tar, or similar backup software because it accesses the source and destination volumes sequentially most of the time.
EXIficient is an implementation of the W3C Efficient XML Interchange (EXI) format specification written in the Java programming language. The EXI format is a very compact representation for the Extensible Markup Language (XML) Information Set that is intended to simultaneously optimize performance and the utilization of computational resources.
Back In Time is a simple backup tool for Linux (Gnome & KDE4) inspired by the "flyback project" and "TimeVault". The backup is done by taking snapshots of a specified set of directories. All you have to do is configure: where to save snapshot, what directories to backup, and when a backup should be done (manually, every hour, every day, every week, or every month). It acts as a "user mode" backup system. This means that you can backup and restore only folders to which you have write access.