David Fetter wrote a Linux howto telling you how to compile, install, and use bzip2, the BWT-based freeware archiver.

http://www.linuxdoc.org/HOWTO/mini/Bzip2.html

A program designed to crack lost passwords for zip and arj files.

http://www.home.ru/vdg/buildframe.html?uzc.htm

This page is a mystery to me.

http://www.fmah.com/NewSite/HTML/Open/FMAH%20Open%20Compression.html

Home of JCALG1, an LZSS derived lossless compression algorithm with full x86 32bit assembly source. Data Compressioni Library user comment: I found LZSS C source and an EXE. The EXE was useful for testing. I expect to use this in an embedded app after further research..

http://www.collakesoftware.com/

ASCENT SOLUTIONS Inc. PKZIP data compression software for MVS (mainframe), Windows (Netzip), VM, VSA, AS/400, UNIX, OS/2, DOS, VMS. All products are 100% cross-platform compatible.

http://www.asizip.com/

EnZip is a freeware Windows compression program. Release 3.0 seems to have shipped in June of 2000, no activity since then.

http://website.lineone.net/~chris_m/

A version of Arj written specifically for 32 bit Windows. From Robert Jung, the author of the ARJ archiver.

http://www.winarj.net/

A program that mungs HTML files in order to make them smaller. Some safe optimizations, some unsafe. Not really compression so much as optimization. Note: I’ve classified this as non-commercial, because the web site makes no mention of any kind regarding payment. I might be wrong.

http://shensr.8m.com/en/index.htm?pr/hc/index.htm

A page of compression links from AltaVista

http://altavista.looksmart.com/eus1/eus53832/eus155852/eus64723/eus64734/r?l&izf&

ZipGenie is yet another archiver that supports a scad of formats, including zip, cab, arj, lha, lza, arc, gz, tar, zoo, gzip, rar, tgz, ace, jar, pak, and z. The author says that the download is multilingual, with help in German, English, Spanish, and French.

http://www.databecker.de/frames.php?PHPSESSD=49485252505251515350594949535059565452

A paper from SID Digest by Ahumada, A. J., Jr.and Rensheng Horng. Getting rid of those annoying DCT artifacts is obviously a big deal for those of you using JPEG and MPEG compression.

http://vision.arc.nasa.gov/publications/sid94ah/94sid.html

A paper by Andrew Watson from NASA Ames Research Center. This paper describes a procedure called DCTune which is claimed to create DCT quantization matrices superior to the default ones used in the JPEG algorithm.

http://vision.arc.nasa.gov/publications/icip94.pdf

This paper from the Mathematica Journal gives some introductory material on using Mathematica to do a bit of image compression.

http://vision.arc.nasa.gov/publications/mathjournal94.pdf

The code from an article from by Sergey Ignatchenko from the October 1998 C User’s Journal. (see ignatch.zip)

ftp://ftp.mfi.com/pub/cuj/1998/cujoct98.zip

Source code from Random Access Data Compression, by Philip Gage (see gage.zip) from the Septeber 1997 C User’s Journal

ftp://ftp.mfi.com/pub/cuj/1997/sep97.zip

Paper by C. Valens describing this algorithm which is frequently used in wavelet based data compression algorithms.

http://perso.wanadoo.fr/polyvalens/clemens/lifting/lifting.html

A proposal on comp.compression for a new method of music compression.

http://www.dejanews.com/getdoc.xp?AN=617408649

Some reflection on the death of Phil Katz

http://www.dejanews.com/getdoc.xp?AN=617731735

Near the end of 1999, Phil Katz showed up on a list of outstanding warrants in Ozaukee County, Wisconsin.

http://DataCompression.info/Miscellaneous/Ozaukee%20County%20Wisconsin%a0%20-%20Sheriff%20
-%20Ozaukee%92s%20Most%20Wanted.htm#k

The description of the point to point protocol, which of course includes a little tiny bit on compression, since you can specify compression in a packet header.

http://www.cis.ohio-state.edu/htbin/rfc/rfc1661.html

A big batch of image compression papers are on line here. I guess the entire contents of all the papers is online thanks to the contributions of the US government. For image compression, this is a fantastic resource.

http://vision.arc.nasa.gov/publications/publications.html

More news regarding the death of Phil Katz.

http://www.jsonline.com/wi/042200/wi--softwarepioneer042200124658.asp

A set of components and DLLs that allow you to manipulate zip files from within your Delphi or C++ Builder programs. It’s all free. Don’t know ifyou can use the DLLs with any other languages.

http://members.tripod.lycos.nl/Vleghert/

An appreciation of Phil Katz by Dr. Dobb’s Journal.

http://www.ddj.com/news/stories/2000/04/do200004nw012.htm

An image conversion program that does smoothing of JPEG images.

ftp://www.jpg.com/pub/PP35.EXE

A long thread dealing with a possible way to some improvement on BWT compression.

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=39013198.26504471%40news.megane
ws.com

These guys are big in the world of software that does image processing. What does this have to do with data compression? Well, they do have products that render, convert, and create compressed formats such as JPEG, TIFF, and GIF.

http://www.leadtools.com/

ScalVico is a Scalable Video Codec based on lattice VQ and motion compensation.

http://www4.informatik.uni-erlangen.de/~jnweiger/ScalVico/Pyramid/

DC is a BWT based archiver by Edgar Binder. Is it free? Not sure, but no source.

ftp://ftp.elf.stuba.sk/pub/pc/pack/dc124.zip

This code is reputedly good for compressing B/W images. The web site refers to it as Difference Adaptive compression. It’s patented.

http://dakx.com/software/simdaxg.c