1StepUnzip
   Easy to use shareware tool for unzipping and installing your downloaded Internet files.
   http://1stepunzip.com/

7-Zip
   Command-line and Windows shell utility for manipulating ZIP archives. Supported formats: ZIP, CAB, RAR, GZIP and TAR.
   http://www.7-zip.org/

Archive Comparison Test
   A set of benchmarks designed to show the state of the art in lossless data compression, by Jeff Gilchrist.
   http://www.compression.ca/

Automatic File Archiver by JSPayne
   Does automatic archiving and backup of recently modified.
   http://www.jspayne.com/filearchiver/

BitJazz Inc.
   Lossless compression for photoquality images. Cross-platform. SDK. Free reader.
   http://www.bitjazz.com

CAM Development - CAM UnZip
   Free zip file utility, which allows you to quickly, open, create, and modify ZIP archives. In addition, CAM Unzip supports password protection, and can run an archive's Setup file automatically after it is unzipped.
   http://www.camdevelopment.com/cuz.htm

Cabextract
   Portable UNIX decompressor for the Microsoft Cabinet (.CAB) format.
   http://www.kyz.uklinux.net/cabextract.php3

CoffeeCup Free Zip Wizard
   Free Zip/Unzip utility. CoffeeCup Free Zip Wizard has built-in E-mail and FTP functions, so you can Zip and send your files in one easy step.
   http://www.coffeecup.com/zip-wizard/

ExpressZIP
   ZIP and UNZIP Management complete with built-in Wizards to walk you through creating ZIP and EXE (self extracting) archives.
   http://www.avantrix.com/exzip.htm

FilZip 2000
   Free application to handle a variety of archive file formats, including .ace, .arc. arj, .cab, .gz, .lha, .jar, .rar, .tar and of course .zip. (Win 9x/NT/2000/Me)
   http://www.filzip.com/

FlyZip - Elegant Algorithms
   New patent pending data compression methods. FlyZip XR data compression utility for Palm OS.
   http://www.fly-zip.com/

GZIPSite Website Compression
   Tool that can help you make static HTML websites run 50% faster and save 50-80% of the bandwidth.
   http://www.applet.dk/

Hifn Inc.
   Designs, develops, and markets compression processors, encryption/compression processors, and software which provide alternatives for the implementation of high performance networks and tape storage devices. (Nasdaq: HIFN).
   http://www.hifn.com/

Impact Labs Inc.
   Develops Windows based compression and encryption software used for still images, documents, and streaming video.
   http://www.impactlabs.com

JET-Software
   Software house in Germany, with compression products for mainframe, midrange and mini systems.
   http://www.jet-software.com/

Maximum Compression
   Aims to show the maximum achievable compression ratio for several filetypes (text, executable). The best 80-100 programs for every filetype are shown in a table indicating compression ratio and switches/options used to achieve that compression.
   http://www.maximumcompression.com/

Official RAR archiver site
   Downloads, Support, Tips, Tricks and Tools. The RAR format, like the other newer formats (bZip, and SIT) compresses files better than the popular, but older Zip algorithm.
   http://www.rarsoft.net/

QccPack
   Quantization, Compression, and Coding Library. C source code freely available.
   http://qccpack.sourceforge.net/

QuikCAT Technologies
   Specializing in data compression software technologies for wireless transmission, Internet acceleration, Microsoft Exchange and Lotus Notes E-mail acceleration, and PDA video conferencing, using cellular automata transforms.
   http://www.quikcat.com

RAR/WinRAR support site
   A support site for RAR and WinRAR archivers.
   http://www.rarlab.com

RARReg
   Offers downloads, support forums and registration for RAR compression tools.
   http://www.rarreg.com/

RICAZip from CAPTEC
   High performance lossless image compression applications, utilities and libraries.
   http://www.ricazip.com

Rarissimo
   Companion tool for WinRAR for preserving NTFS alternate streams.
   http://peccatte.karefil.com/Software/Rarissimo/RarissimoEN.htm

RemoteZip Zip File Manager
   A ZIP File Manager that runs on a Web server and has a browser based interface.
   http://www.stonebroom.com/remzip.htm

SHCODEC
   A efficient static huffman coder. The package contains source code, test program and documentation..
   http://webcenter.ru/~xander/

Smacker Video Technology
   A compressor for video, animation and sound data includes video compression with twice the video quality and now uses the Bink audio codec for perceptually lossless 8 to 1 compression.
   http://www.radgametools.com/smkmain.htm

SolutionSoft Systems, Inc.
   E-Space, compression software for online archiving and disk space management.
   http://www.solution-soft.com/

Spirit Corp
   Offers MP3 codecs and voice compression algorithms.
   http://www.spiritcorp.com/vocoders.html

Tomeraidit
   Creates compressed TomeRaider files, allows unsurpassed text compression (45%-60%), plus TR files are portable between platforms of Windows, PDA (palm, pocket PC or psion)
   http://www.tomeraidit.com/

USENET Compression FAQ
   This URL takes you to a compression FAQ that explains compression to technical people as well as describing the various programs, and what they do to users.
   http://www.faqs.org/faqs/compression-faq/

Video Compression Components
   Third-party video compression software components for programmers.
   http://www.imaging-components.com/

WarpZip
   Data compression utility for the OS/2 family of operating systems. Extensive drag and drop implementation and speech enabled utility that deals with "zip" and OS/2 "packed" archive formats.
   http://www.pillarsoft.net/

Web-based Stuffit to Zip converter
   Free web based stuffit to zip archive conversion.
   http://www.entropyfarm.org/software/sit2zip

WinAce
   Relative new though already used on many sites. When compared to WinZip the most important advantage of WinAce is better compression.
   http://www.winace.com

WinRAR - deutsche Download- und Supportsite
   German site for WinRar.
   http://www.winrar.de

WinZip
   WinZip is a windows data compression utility that focuses on the Zip data compression format for windows users. It took the lead from PKZIP when windows was introduced.
   http://www.winzip.com

WinZip Splitter
   Split and rejoin WinZip(R) archives for e-mail transmission in two mouse clicks.
   http://www.winzipsplitter.com

XMill
   Compressor for XML data, available as source code and binaries for Windows and Linux. [Freeware]
   http://www.research.att.com/sw/tools/xmill/

Xceed Software Inc.
   Makers of Zip and Unzip data compression controls for Windows developers that use ActiveX, OCX, VBX and DLLs.
   http://www.xceedsoft.com

ZBit Inc.
   COM objects to Zip and Unzip files.
   http://www.zbitinc.com

ZipALot
   Takes all the ZIP archives from one directory and extracts them to another one, allows you to handle more than one ZIP archive at once. Free open-source software for Win32.
   http://www.ractive.ch/gpl/zipalot.html

ZipMail
   Compression for Lotus Notes, that automatically compresses attached files into ZIP files or self-extracting files. Features full integration with the Lotus Notes email client software.
   http://www.notes-compression.com/

Zipbit
   Works with popular archive types and has skin support.
   http://www.zipbit.com/

Zipsearch
   Zipsearch is shareware to search compressed zip archives for files inside archives. The program finds text strings within the files for viewing and changes.
   http://www.filehunter.com/ZipsearchDetails.htm

Zzip
   A compression tool under GPL. Zzip compression algorithm is mainly based on the Burrows-Wheeler Transform method developped by Mike Burrows and David Wheeler.
   http://debin.org/zzip/

x-PRESS
   Delivers cross-platform data compression for data transfer, archiving, and retrieval.Part of the CoSORT family of sort and data manipulation solutions.
   http://www.iri.com/public/solutions/xpress/xpress.htm

zlib
   A massively spiffy yet delicately unobtrusive compression library.
   http://www.gzip.org/zlib/