storeBackup is a backup utility that stores files on other disks. It's able to compress data, and recognize copying and moving of files and directories (deduplication), and unifies the advantages of traditional full and incremental backups. It can handle big image files with block-wise changes efficiently. Depending on its contents, every file is stored only once on disk. Tools for analyzing backup data and restoring are provided. Once archived, files are accessible by mounting file systems (locally, or via Samba or NFS). It is easy to install and configure. Additional features are backup consistency checking, offline backups, and replication of backups.
tarix is a simple indexer for GNU and POSIX tar files. The indexes allow fast extraction of files in the archive, especially on seekable tape devices. The index format is simple enough to be used from a rescue disk with only mt, dd, and tar (though grep and sed would be very useful there).
tarmill compresses and encrypts tar archives, and is designed for use in backup scripts. Unlike most other solutions, each archive member is handled separately, so damage in the middle of the archive does not render the rest of the archive unusable; it is possible to resume at the next readable member header. Compressed and encrypted archives remain valid tar files, so any well-behaved tar implementation will be able to list (but not extract) them.
tresor is an application for performing full backup and fast restores with bytepositioning tape drives. This option is available on some Tandberg and Wangtek streamers and some SCSI-2 tape drives. It features flexible configuration, a database for multiple volumes, fast restores (due to direct seeking), a graphical user interface, tape operations based on dd, afio, and mt, and tape identification using its own header. Language support for German and English is included.