data compression link collection


An archive is a file that contains (possibly) multiple compressed files. It will also usually contain additional information about the file, such as file length, date, permissions, compression type, and so on. One of the most popular formats for file archives is the Zip format, originally developed by PKWare, and now supported by many other free and commercial programs.

SQUASHFS - A squashed read-only filesystem for Linux

Squashfs is a highly compressed read-only filesystem for Linux (kernel 2.4.x). It uses Gzip compression to compress files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimise data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.

Version 3.2 of squashfs released in January, 2007.

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Posted in July 2nd, 2007

Zip and Unzip Using VB5 or VB6

Some sample code and a tutorial explaining how to use the InfoZip DLLs with VB.


Posted in September 12th, 2004

Package: unrar (1:0.0.1-1)

Unrar can extract files from .rar archives. Can’t handle archives in the RAR 3.0 format.


Posted in July 29th, 2004

Ch zlib Package

Ch zlib Package is Ch interface to zlib. Ch is a C/C++ interpretive freely available from htpp:// Ch zlib Package alllows zlib applications with compression and decompression function runs in Ch across platform without compilation. Ch zlib Package includes the source code for building the binding to zlib.

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Posted in July 28th, 2004


Yet another Windows archiving program. PowerArchiver comes with a nice long list of supported formats: ZIP, CAB, LHA (LZH), TAR, TAR.GZ, TAR.BZ2, BH, RAR, ARJ, ARC, ACE, ZOO, GZ, BZIP2, XXE, and UUE. Plus a built-in viewer for JPG, GIF, and a few other formats.

Release 9.0 of PowerArchiver shipped July, 2004.

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Posted in July 16th, 2004

DynaZIP ZIP/UNZIP toolkits

DynaZIP offers just about everything you’d want to work with Zip files in a Win32 environment. user Mike L. had this to say: Creates huge output executables. Features contained in multiple packages are contained in a single package in comparable products. Pricing is very steep compared to comparable products.

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Posted in July 16th, 2004


PicoZip is an award winning file compression utility that runs on all 32-bit Windows platforms such as Windows 95, 98, ME, NT4, 2000 and XP. It is extremely easy to use, yet contains many advanced features that helps you create or unzip ZIP files, as well as most other popular archive formats like RAR, ACE, LHA, JAR, etc.

PicoZip 3.0 shipping as of July, 2004. user Derek P. had this to say: This is one of the best Zip Utilities out there! The Batch Testing of Archives tool is fast and accurate!!! Other Zip Utility Makers need to take notes!.

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Posted in July 16th, 2004


JSPFM supports the standard file operations of creation, editing, copying, moving, deleting, renaming and compression/decompression of files and directories. JSPFM also supports some special file operations specific to certain file types such as transposition and resizing of image type files.


Posted in July 10th, 2004

Practical Compressor Test

Published in Results, Archiving

Unlike some other compressor comparison sites, I won’t be looking for a compressor offering for the last bit of compression. Instead I’ll try to find the most practical compressor out there.


Posted in July 10th, 2004

Managed C++ wrapper for Zlib

In this article I present a namespace of managed types that provide a wrapper to some of the standard functionalities exported by ZLib. ZLib is a well known free, general-purpose lossless data-compression library for use on any operating system.


Posted in July 10th, 2004

EmilCont Ultracompression

Published in Results, Archiving

This site compares compressors on the basis of compression ratios only. Speed is not an issue.


Posted in July 10th, 2004

UPX - the Ultimate Packer for eXecutables

Markus F.X.J. Oberhumer & László Molnár have created an executable packer that works on DOS, Linux, and Windows executables.
A DCL user had this to say: UPX is just excellent - and it’s free.

UPX 1.25 is shipping as of June, 2004.

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Posted in July 4th, 2004


Use the zipdiff tool when you need to compare the contents of two zip files. It is equally suited for comparing jar files, EAR files, WAR files or RAR files. Run it standalone or as an Ant task. The tool supports three output formats: plain text, XML, and HTML. zipdiff is written in Java.

Release 0.4 is shipping as of June, 2004.


Posted in July 4th, 2004

The Heirloom Toolchest

The Heirloom Toolchest includes Open Source cpio and tar implementations running on Linux, Solaris, and Open UNIX. cpio is able to read and write all known Unix cpio archive formats, including proprietary ones, and zip files, including support for the zip64 format.

The most recent update of the project was on June 30, 2004.


Posted in July 4th, 2004


p7zip is a quick port of 7za.exe (command line version of 7zip, see for Unix. 7-Zip is a file archiver with highest compression ratio.

Version 0.81 is shipping as of July, 2004.


Posted in July 4th, 2004

ZLib dotNet

Microsoft .NET Stream-derived objects that wrap ZLib inflate and deflate functions (C++ Mixed Mode implementation)

Version 1.0.1 is shipping as of June, 2004.

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Posted in June 27th, 2004

Zip Utils - clean, elegant, simple, C++/win32

This source code shows how to add zip/unzip functionality to your programs. Claim to fame: simplicity and clean packaging.


Posted in June 24th, 2004

MemoryStream Compression

An article that describes MemoryStream based Compression based on SharpZipLib.

Last updated June 21, 2004.


Posted in June 21st, 2004

Self-Extracting Archive Utility

This program from Gammadyne is used to create a professional quality installation program out of an archive file.

Version 11.3 was shipping as of June, 2004.

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Posted in June 20th, 2004

DOGG’s Compression Ratings

Published in Results, Archiving

A rating of roughly 20 different compressors - strictly based on size.

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Posted in June 20th, 2004


Zipgenius is yet-another-archiver. Supports 21 different compression formats, plus a pretty long list of extras, such as FTP support, email, backup functions, and more. The long list of features might make you expect a price tag, but ZipGenius is in fact free!

Version of ZipGenius is shipping as of June, 2004.


Posted in June 14th, 2004


Published in Commercial Programs, Zip

Does everything you want, and costs a lot less than the two market leaders!

Version 3.0 is shipping as of June, 2004.


Posted in June 14th, 2004


There are two programs named SimplyZip. This is the free one from Germany. This program has an awesome list of supported archives formats.

Version 1.1 is shipping as of June, 2004


Posted in June 14th, 2004

PKWAre Self Extractor (SFX) and Secure Data Distribution Licenses

PKWare lets you create secure SFX files for distributing data. However, they aren’t going to tell you how much you have to pay on this page - you have to fill out an inquiry form and send it to their sales team.


Posted in June 13th, 2004


PECompact compresses Windows executables significantly, while allowing them to be run as normal. You can compresses code, data, import/export table, and selected resources. Section merging and resource data restructuring are also supported. It trims, optimizes, and realigns the PE structure while preserving shell icons and version information, or any other resources you chose to leave uncompressed. Uses its own JCALG1 compression, which offers decent compression speed, great compression ratio, and extremely rapid decompression.

Version 2.28 is shipping in June, 2004.


Posted in June 13th, 2004

Petite Win32 Executable Compressor

Petite is a Win32 (Windows 95/98/2000/NT/XP) executable (EXE/DLL/etc…) compressor. The compressed executables decompress themselves at run time, and can be used just like the original uncompressed versions. Petite also adds virus detection to the compressed executables - they will check themselves for infection every time they are executed.


Posted in June 13th, 2004


This is reportedly a Win32 exe packer. However, this is a Chinese langauge site so even that is just a guess.


Posted in June 13th, 2004

PeX home page

This is reputedly the home page of the PeX executable cracker. However, the fact that the page appears to be in Polish keeps me from saying more than that.


Posted in June 13th, 2004

CoffeeCup Free Zip Wizard

Your basic free zip program. Includes the normal archiving functions, plus some search, email, and ftp options as well.

Version 2.5 is shipping as of June, 2004.


Posted in June 6th, 2004

PE Compression Test

A nice set of tests comparing a wide variety of executable packers.

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Posted in June 6th, 2004