Compression

Compression via Arithmetic Coding in Java - Unrestricted open-source Java implementation of the PPM (prediction by partial matching) algorithm for text and data compression by Bob Carpenter. Builds with ant.
http://www.colloquial.com/ArithmeticCoding/

MacKiDo - Provides brief overview of shape compression, run-length encoding, and Lempel-Ziv.
http://www.igeek.com/articles/Software/Compression.txt

Data-Compression.com - A website devoted to the principles and practice of data compression.
http://www.data-compression.com

ACM Crossroads Data Compression Issue - Data Compression issue of ACM Crossroads, the student magazine of the Association for Computing Machinery.
http://oldwww.acm.org/crossroads/xrds6-3/

Vcodex - Video and image coding tutorials, links, resources and research.
http://www.vcodex.com/

Tutorial on Image Compression - A tutorial on Image Compression, with step by step procedural examples and list of references, along with sample code.
http://www.debugmode.com/imagecmp/

comp.compression Frequently Asked Questions - List from Usenet.
http://www.faqs.org/faqs/compression-faq/

PKZIP Application Note - Describes the compression and decompression algorithms used by PKZIP.
http://www.pkware.com/index.php?option=com_content&task=view&id=64&Itemid=107

Data Compression Reference Center - Basic facts, algorithms, hardware, links, and a glossary.
http://oldwww.rasip.fer.hr/research/compress/

The Canterbury Corpus - A set of benchmark results for various lossless compression methods. Includes test files and compression test results for many research compression methods.
http://corpus.canterbury.ac.nz

Practical Huffman Coding - A tutorial by Michael Schindler.
http://www.compressconsult.com/huffman/

DataCompression.info - Directory of data compression sites. Allows user to rate the listed sites.
http://datacompression.info/

Sparse Matrix Compression Schemes - Pseudocode for a spare matrix compression algorithm.
http://www.angelfire.com/ri/hirschberg/

3D Graphics Compression Homepage - A directory of 3D graphics compression information, researchers, and commercial products on the web.
http://www.3dcompression.com/

The Art of Lossless Data Compression - Results of tests performed to compare lossless compression of various data by all known good enough programs. Descriptions of test terms and files. Links to related programs, and pages.
http://geocities.com/SiliconValley/Bay/1995/

The LBE Data Compression Algorithm - A Huffman like algorithm that uses triangular matrices, rather than binary trees, for string substitution. Free source code available.
http://in.geocities.com/iamthebiggestone/

Compression - Computing Reference - Explanation of compression and various compression schemes at eLook Computing Reference.
http://www.elook.org/computing/compression.htm

Arturo Campos: Compression Programming - Articles on various compression algorithms.
http://www.arturocampos.com/

Dr Ross's Compression Crypt - LZRW* text compression algorithms. Links to other compression sites.
http://www.ross.net/compression/

SPIHT - The Set Partitioning In Hierarchical Trees algorithm for image and video compression. Documentation and resources.
http://www.cipr.rpi.edu/research/SPIHT

The Data Compression Resource - Algorithms, links, comparisons, conferences, corpora and the home of the compressor ABC.
http://www.data-compression.info/

Data Compression - From PC Webopedia definition and links.
http://webopedia.com/TERM/d/data_compression.html

How Stuff Works: How File Compression Works - Detailed narrative fully describes how a file is actually deflated, or compressed to get rid of redundancy - and save space.
http://www.howstuffworks.com/file-compression.htm