The purpose of libmspack is to provide both compression and decompression of some loosely related file formats used by Microsoft.

This package provides the reference implementation of Brotli, a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression.

The specification of the Brotli Compressed Data Format is defined in RFC 7932.

This package provides a simple zip library based on miniz.

SfArk extractor converts SoundFonts in the compressed legacy sfArk file format to the uncompressed sf2 format.

Minizip is a minimalistic library that supports compressing, extracting and viewing ZIP archives. This version is extracted from the zlib source.

unrar-free is a free software version of the non-free unrar utility. This program is a simple command-line front-end to libarchive, and can list and extract not only RAR archives but also other formats supported by libarchive. It does not rival the non-free unrar in terms of features, but special care has been taken to ensure it meets most user's needs.

This package provides a parallel implementation of gzip that exploits multiple processors and multiple cores when compressing data.

gzstream is a small library for providing zlib functionality in a C++ iostream.

minizip-ng is a zip manipulation library written in C, forked from the zip manipulation library found in the zlib distribution.

Draco is a library for compressing and decompressing 3D geometric meshes and point clouds. It is intended to improve the storage and transmission of 3D graphics.

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 is written in ANSI C. Both the source code and the compressed data format are designed to be portable across platforms.

Blosc is a high performance compressor optimized for binary data (i.e. floating point numbers, integers and booleans, although it can handle string data too). It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() system call. Blosc main goal is not just to reduce the size of large datasets on-disk or in-memory, but also to accelerate memory-bound computations.

C-Blosc2 is the new major version of C-Blosc, and is backward compatible with both the C-Blosc1 API and its in-memory format. However, the reverse thing is generally not true for the format; buffers generated with C-Blosc2 are not format-compatible with C-Blosc1 (i.e. forward compatibility is not supported).

Fcrackzip is a Zip file password cracker.

Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression. ZopfliCompress supports the deflate, gzip and zlib output formats. This library can only compress, not decompress; existing zlib or deflate libraries can decompress the data.

Lzlib is a C library for in-memory LZMA compression and decompression in the lzip format. It supports integrity checking of the decompressed data, and all functions are thread-safe. The library should never crash, even in case of corrupted input.

LZFSE is a Lempel-Ziv style data compression algorithm using Finite State Entropy coding. It targets similar compression rates at higher compression and decompression speed compared to Deflate using Zlib.

Blosc is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() system call. Blosc is meant not only to reduce the size of large datasets on-disk or in-memory, but also to accelerate memory-bound computations.

Zutils is a collection of utilities able to process any combination of compressed and uncompressed files transparently. If any given file, including standard input, is compressed, its decompressed content is used instead.

zcat, zcmp, zdiff, and zgrep are improved replacements for the shell scripts provided by GNU gzip. ztest tests the integrity of supported compressed files. zupdate recompresses files with lzip, similar to gzip's znew.

Supported compression formats are bzip2, gzip, lzip, and xz. Zutils uses external compressors: the compressor to be used for each format is configurable at run time, and must be installed separately.

ECM is a utility that converts ECM files, i.e., CD data files with their error correction data losslessly rearranged for better compression, to their original, binary CD format.

Parallel Zstandard (PZstandard or pzstd) is a multi-threaded implementation of the Zstandard compression algorithm. It is fully compatible with the original Zstandard file format and command-line interface, and can be used as a drop-in replacement.

Compression is distributed over multiple processor cores to improve performance, as is the decompression of data compressed in this manner. Data compressed by other implementations will only be decompressed by two threads: one performing the actual decompression, the other input and output.

FastJar is an attempt to create a much faster replacement for Sun's jar utility. Instead of being written in Java, FastJar is written in C.

Lzop is a file compressor which is very similar to gzip. Lzop uses the LZO data compression library for compression services, and its main advantages over gzip are much higher compression and decompression speed (at the cost of some compression ratio).

7-zip is a command-line file compressor that supports a number of archive formats and features self-extracting archives.

The zchunk compressed file format allows splitting a file into independent chunks. This makes it possible to retrieve only changed chunks when downloading a new version of the file, and also makes zchunk files efficient over rsync. Along with the library, this package provides the following utilities:

unzck

To decompress a zchunk file.

zck

To compress a new zchunk file, or re-compress an existing one.

zck_delta_size

To calculate the difference between two zchunk files.

zck_gen_zdict

To create a dictionary for a zchunk file.

zck_read_header

To read a zchunk header.

zckdl

To download a zchunk file.