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.