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The lzlib compression library provides in-memory LZMA compression and decompression functions, including integrity checking of the uncompressed data. The compressed data format used by the library is the lzip format.

This is a simple command line implementation of the LZMA compression algorithm from the LZMA SDK. It uses a raw LZMA format instead of the xz or 7z container formats, and produces compression ratios that are usually about 25-30% better than bzip2, and decompression speeds that are about twice as fast. The disadvantages are higher CPU and RAM requirements for compression.

LZO is a data compression library which is suitable for data de-/compression in real-time. This means it favours speed over compression ratio. LZO implements a number of algorithms with the following features: + Decompression is simple and *very* fast. + Requires no memory for decompression. + Compression is pretty fast. + Requires 64 kB of memory for compression. + Allows you to dial up extra compression at a speed cost in the compressor. The speed of the decompressor is not reduced. + Includes compression levels for generating pre-compressed data which achieve a quite competitive compression ratio. + There is also a compression level which needs only 8 kB for compression. + Algorithm is thread safe. + Algorithm is lossless.

lzop is a file compressor which is very similar to gzip. It uses the LZO library for compression services and its main advantages over gzip are much higher compression and decompression speed (at the cost of some compression ratio). lzop is distributed under the terms of the GNU General Public License (GPL).

The Zlib library allows to deflate compressed files and to create gzip (.gz) files. Zlib is free software and small. An archive in ZIP format can contain several files compressed with this method, while a .gz archive can containt only one file. It is a very popular format, that is why I have written a package for reading files compressed within a Zip archive.

Plzip is a massively parallel (multi-threaded), lossless data compressor based on the LZMA algorithm, with very safe integrity checking and a user interface similar to the one of gzip or bzip2. Plzip uses the lzip file format; the files produced by plzip are fully compatible with lzip-1.4 or newer.

Simple command line implementation of PPMD compression algorithm. It is based on code by Dmitry Shkarin (archivers/ppmd) but reworked by Igor Pavlov and bundled with 7zip.

UCL is a portable lossless data compression library written in ANSI C. UCL implements a number of compression algorithms that achieve an excellent compression ratio while allowing *very* fast decompression. Decompression requires no additional memory.

This is the set of GNU shar utilities. This port installs them with the letter "g" prepended to their names, to avoid conflict with the FreeBSD base system. The uudecode and uuencode commands are omitted (BSD versions are present in the base system). The shar utilities deal with shar files, so-called shell archives, which are scripts suitable for transmission by e-mail or Usenet. When a shar file is executed, the files it contains are unpacked without the need for any software other than the shell itself and sed. Because they are scripts, shell archives from strangers should be read before executing them, to check for harmful commands. synopses from the info pages: * gmail-files: Send files to remote site. * gmailshar: Make and send a shell archive. * gremsync: Synchronize remote directory trees using e-mail. * gshar: Make a shell archive. * gunshar: Explode a shell archive.

Unzip will list, test, or extract files from a ZIP archive, commonly found on MS-DOS systems. The default behavior (with no options) is to extract into the current directory (and subdirectories below it) all files from the specified ZIP archive. Unzip is compatible with archives created by PKWARE's PKZIP, but in many cases the program options or default behaviors differ. Zipinfo lists technical information about files in a ZIP archive, most commonly found on MS-DOS systems. Such information includes file access permissions, encryption status, type of compression, version and operating system or file system of compressing program, and the like. Funzip acts as a filter; that is, it assumes that a ZIP archive is being piped into standard input, and it extracts the first member from the archive to stdout. If there is an argument, then the input comes from the specified file instead of from stdin. Unzipsfx may be used to create self-extracting ZIP archives from previously created ZIP archives.