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[excerpt from borgbackup web site] 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.

QuaZIP is a simple C++ wrapper over Gilles Vollant's ZIP/UNZIP package that can be used to access ZIP archives. It uses Trolltech's Qt toolkit.

Snappy-java is a Java port of snappy, a fast C++ compresser/decompresser developed by Google.

Star is the fastest known implementation of a tar archiver. Main advantages over other tar implementations: fifo - Keeps the tape streaming. pattern matcher - For a convenient user interface. sophisticated diff - User tailorable interface for comparing tar archives against file trees. no namelen limitation - Pathnames up to 1024 Bytes may be archived. deals with all 3 times - Stores/restores all 3 times of a file. does not clobber files - More recent copies on disk will not be clobbered from tape. automatic byte swap - star automatically detects swapped archives. automatic format detect - Automatically detects archive formats: old tar, gnu tar, ansi tar, star. fully ansi compatible - star is fully ANSI/Posix 1003.1 compatible. Please mail bugs and suggestions to: Author: Joerg Schilling <js@cs.tu-berlin.de>

The Unarchiver is an archive unpacker program with support for the lots of popular ZIP, RAR, 7z, tar, gzip, bzip2, LZMA, XZ, CAB, MSI, NSIS, EXE, ISO, BIN, split file formats, as well as the old Stuffit, Stuffit X, DiskDouble, Compact Pro, Packit, cpio, compress (.Z), ARJ, ARC, PAK, ACE, ZOO, LZH, ADF, DMS, LZX, PowerPacker, LBR, Squeeze, Crunch, and other old/obscure formats. It can also handle filenames in foreign character sets, created with non- English versions of some operating systems, and is particularly useful for processing CJK archives correctly.

The interface is like zipfile extension included in regular python distribution.

The RPM Package Manager is a powerful command line driven package management system capable of installing, uninstalling, verifying, querying, and updating computer software packages. Each software package consists of an archive of files along with information about the package like its version, a description, and the like. There is also a related API ("Application Program Interface"), permitting advanced developers to bypass 'shelling out' to a command line, and to manage such transactions from within a native coding language.

rzip is a compression program, similar in functionality to gzip or bzip2, but able to take advantage from long distance redundancies in files, which can sometimes allow rzip to produce much better compression ratios than other programs. The principal advantage of rzip is that it has an effective history buffer of 900 Mbyte. This means it can find matching pieces of the input file over huge distances compared to other commonly used compression programs. The gzip program by comparison uses a history buffer of 32 kbyte and bzip2 uses a history buffer of 900 kbyte. The second advantage of rzip over bzip2 is that it is usually faster. This may seem surprising at first given that rzip uses the bzip2 library as a backend (for handling the short-range compression), but it makes sense when you realise that rzip has usually reduced the data a fair bit before handing it to bzip2, so bzip2 has to do less work.

Command-line utilities to: * create StuffIt (.sit) and Zip (.zip) archives * encode files into uuencode, BinHex, and MacBinary formats * expand StuffIt and Zip archives * expand encrypted StuffIt archives * decode or expand: Compact Pro, zip, arc, arj, lha (lzh), rar, gzip, UNIX compress, uuencode, BinHex, btoa, MIME, tar, MacBinary, segmented StuffIt, PrivateFile, bzip2, and AppleSingle.