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Zip is a compression and file packaging utility. It is compatible with PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems. There is a companion to zip called unzip (of course) which you can also install from the ports/package system.

Sometimes, when you run 2 different .ZIP programs on the same data (PKZIP & KZIP for example), some files get compressed better in one program, while other files get compressed better in the other. ZIPMIX will take the best files from each one and create a new output file, which is guaranteed to be equal to or smaller in size to both of the input files. ZIPMIX can also be used to perform boolean operations on ZIP files, such as merging 2 ZIP files together, or updating a new file (with some tricks).

Zipper is a tool for extracting and viewing archive files in GNUstep. LICENSE: Public Domain

Zoo is used to create and maintain collections of files in compressed form. It uses a Lempel-Ziv compression algorithm that gives space savings in the range of 20% to 80% depending on the type of file data. Zoo can store and selectively extract multiple generations of the same file. Data can be recovered from damaged archives by skipping the damaged portion and locating undamaged data with the help of fiz(1).

Zopfli is a new zlib (gzip, deflate) compatible compressor. This compressor takes more time (~100x slower), but compresses around 5% better than zlib and better than any other zlib-compatible compressor we have found.

Zutils is a collection of utilities able to deal with any combination of compressed and non-compressed files transparently. If any given file, including standard input, is compressed, its decompressed content is used. Compressed files are decompressed on the fly; no temporary files are created. The provided utilities are: Zcat - Decompresses and copies files to standard output. Zcmp - Decompresses and compares two files byte by byte. Zdiff - Decompresses and compares two files line by line. Zgrep - Decompresses and searches files for a regular expression. Ztest - Tests integrity of compressed files. Zupdate - Recompresses files to lzip format. The supported compressors are bzip2, gzip, lzip, and xz.

Xarchiver is a Desktop Environment independent archiver frontend. All common archive types are supported. RPM and ISO are handled without rpm or isodump executables.

The Zip-Ada library is written entirely in Ada, allowing compression operations without any OS-dependent external calls on streams and files. In addition to the library and command-line demos, it has these tools: * zipada - create compressed Zip archive * comp_zip - utility to compare contents of two Zip archives * find_zip - utility to search for text stream of Zip archive * rezip - tool for recompressing Zip archives towards optimal compression * debzip2 - tool to decompress BZip2 compressed files (.bz2)

The unRAR utility is a freeware program, distributed with source code and developed for extracting, testing and viewing the contents of archives created with the RAR archiver, version 1.50 and above. For the usage and distribution license please read the file LICENSE.TXT. The unRAR utility is a minor part of the RAR archiver and contains RAR uncompression algorithm. UnRAR requires very small volume of memory to operate.

Zstd, short for Zstandard, is a real-time compression algorithm providing high compression ratios. It offers a very wide range of compression vs. speed trade-offs while being backed by a very fast decoder. It offers a special mode for small data called "dictionary compression" and it can create dictionaries from any sample set. Zstd is BSD-licensed. Using Izbench on the Silesia compression corpus, zstd ranked at the top with a compression ratio of 2.877, a compression rate of 325 Mb/s, and a decompression rate of 325. Zlib followed at 2.730, 95 Mb/s (C) and 360 Mb/s (D). See WWW page for the full benchmark results.