A little short on docs here, but from the title we’d have to guess that John De Bock compresses the source code for the GIMP and lists the results.

read more from " GIMP Source Compression Test "

This Code Project article describes a program that breaks down and analyzes MPEG-2 steams.

read more from " An analyzer for MPEG 2 Program Stream files "

Archive Explorer is a pure VB program that is capable of showing the contents of different archives and some archives can be extracted. Contents can be shown are: ZIP,GZ,TGZ,TAR,ARC,ARJ,RAR,CAB,LZH,LHA. Contents can be extracted are: ZIP,GZ,TGZ,TAR.

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“Jpegpixi” is short for “JPEG pixel interpolator”. It is a command-line utility which interpolates pixels in JFIF images (commonly refered to as “JPEG images”). This is useful to correct images from a digital camera with CCD defects. Jpegpixi is unique in that it tries to preserve the quality of the JFIF image as much as […]

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OptiPNG is a PNG optimizer that recompresses the image files to a smaller size, without losing any information.
The idea behind this program has been inspired from pngcrush (http://pmt.sourceforge.net/pngcrush), and is explained in detail in the PNG-Tech article “A guide to PNG optimization”

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Tool for the building of simple avisynth script from which is possible to automate the video compression with any codec and audio files into the formats: Mp3, Ogg and Wav; the tool have also a Compress Test and a Bitrate/size calc.

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This open source package, e2compr, provides transparent compression and decompression of Linux ext2 file systems.

Version 0.4.44 is shipping as of April, 2004.

read more from " Linux File System Compression "

An open source project aiming to create a free codec that supports the MPEG4 LOW and MAIN profiles. Currently available as a command line encoder and Win32 DLL.

Version 1.24 shipped in April of 2004.

read more from " Freeware Advanced Audio Coder (FAAC) "

This is an open-source package of DjVu programs and libraries, including encoders, viewers, browser plugins, and various utlities. The DjVu standard for document encoding was once an ATT research project, but now has been commercialized by LizardTech. This project is an attempt to popularize and evangelize the DjVu technology, with at least the benign awareness […]

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The Speex project aims to build a patent-free, Open Source/Free Software voice codec. Unlike other codecs like MP3 and Ogg Vorbis, Speex is designed to compress voice at low bitrates in the 8-32 kbps/channel range. Possible applications include VoIP, internet audio streaming, archiving of speech data (e.g. voice mail), and audio books. In some […]

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C# implementation of adaptive Huffman coding. Implements both the FGK and Vitter algorithm variations. Compression provided through two public classes, AdaptiveHuffmanProvider and AdaptiveHuffmanStream. Good compression ratios for text-based data

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lesspipe.sh is an input filter for the pager less as described in its man page. The script runs under a ksh compliant shell (ksh, bash, zsh) and allows to view files with binary content, compressed files, archives and files contained in archives. A large and growing number of formats are supported both as plain and […]

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This looks like the page that contains the latest reference software used by the Joint Video Team as part of the H.264 standardization effort.

read more from " TML Software Coordination "

Arkadi Kagan has created a C++ project that implements a batch of our favorite lossless algorithms, including LZ77, LZ78, LZW, RLE, along with arithmetic and Huffman coding.
Version 1.1 shipped in April, 2004.

read more from " Compression Algorithms "

AutoZIP Backup is professional software that lets you automate the backup of your precious files to a ZIP archive.

Version 1.0 of this product is shipping as of April, 2004.

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AVInfo is a utility for displaying AVI and MPEG (1, 2) information. It returns the length of a clip, FPS, resolution, codec, audio and video bit rate, number of key frames, sound parameters, and the number and type of streams, including detailed information for each, generating a filelist with statistics.

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WS:Compress Out is a member of Websetters family of Microsoft Office Add-Ins. This Add-In extends the functionality of Microsoft Outlook 2000, 2002 and 2003. Every time you send an email that contains attachments, WS:Compress Out will automatically compress the attachment and resave in the mail item. This reduces the amount of storage used by you […]

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BAR Archiver is a free, cross-platform file compression and archiving tool written in Java. It outperforms most of the popular file
compression tools available as commercial utilities.
Compression is based on Burrows Wheeler Transformation and modified Huffman entropy coder. The compression ratio is in par
with most of the commercial grade compression utilities.

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compaact! allows you to easily encode your audio files with the high quality coding algorithm MPEG-4 AAC (Advanced Audio Coding). compaact! is capable of multichannel encoding and comes with extensive audio preprocessing features to achieve even better encoding results.

Version 1.2 is shipping in April, 2004.

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VorbisSPI is a Java Service Provider Interface that adds OGG Vorbis audio format support to Java platform. It supports icecast streaming. It is based on JOrbis Java libraries.

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A managed C++ program to compress audio using the Windows Medai Audio codecs.

read more from " Windows Media Audio compressor "

A straightforward article with some discussion and links.

read more from " Working with GIF images in Delphi "

A free archiver for Win32 that supports a really great list of formats, including the obvious Zip but some from left field as well, such as ARJ, RAR, and 7-Zip.

Reader LS said: Very nice, simple to use (even for experienced users!)
Version 3.4.1.6 is shipping as of April, 2004.

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Another graphical zip tool. Has some interesting capabilities, including viewing while downloading, uploading to ftp sites, splitting zip files, etc.

read more from " BigSpeed Zipper "

This package is used to read DVI files created by TeX et.al. and convert them to PNG files. It claims to be quite fast.

Version 1.0 is shipping as of March 29, 2004.

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This web site offers you random numbers generated using quantum process, which sounds like the gold standard to me.

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The unace utility is used for extracting, testing and viewing the contents of archives created with the ACE archiver.

read more from " Unace - extract, test and view .ace archives "

From Microsoft: This document describes Binary Delta Compression (BDC) technology and its use in software update deployment. This implementation of BDC technology developed by Microsoft reduces the download size of software update packages by downloading only the differences between old files and new files.

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Decodes AC-3 audio from DVDs, or QuickTime audio, and spits back AIFF, MP3, or AAC files.

read more from " http://sourceforge.net/projects/mac3dec/ "

This site is dedicated to open source QuickTime development for popular open source audio and video codecs. We are currently working on Ogg Vorbis, an audio codec developed by Xiphophorus, and MNG, an animation video codec.

read more from " QuickTime Components Project "