[image]
http://code.google.com/p/artwork-compression-kit - Making old tiny graphics even tinier
http://code.google.com/p/clam-compression-studio - selective image and video compression
http://code.google.com/p/compression-image-grol - compression d'image par reconnaissance de forme
http://code.google.com/p/libopen - A library written for lossy image compression.
http://code.google.com/p/neural-image-compression - A Image Compression Tool Using Neural Networks
http://code.google.com/p/optimized-contextual-coder - Wavelet image compression with optimized contexts
http://code.google.com/p/webp - Repository for tools for the WebP image format
http://code.google.com/p/wavelet-compressor - Wavelet compression tool

http://code.google.com/p/jpeg-compressor - Public domain JPEG compressor in a single C++ source file.
http://code.google.com/p/jpeg2000 - A solution for image capture, compression and transmission by using jpeg2000 in an embedded system
http://code.google.com/p/openjpeg - Open-source C-Library for JPEG 2000

http://code.google.com/p/crunch - Advanced lossy DXTn texture compression library for game developers
http://code.google.com/p/gimp-dds - A plugin for GIMP that provides support for the DDS image format
http://code.google.com/p/libsquish - Open source DXT compression library.
http://code.google.com/p/nvidia-texture-tools - GPU-accelerated Texture Tools with support for DirectX 10 texture formats


[archiver]
http://code.google.com/p/barred - BWT based File Archiver
http://code.google.com/p/fastarchive - Fast, multithreaded compression of multiple filesets
http://code.google.com/p/freearc - The world's most efficient and feature-rich archiver
http://code.google.com/p/idzip - Seekable, gzip compatible, compression format
http://code.google.com/p/openzip - Open source platform independed archiving and compression tool
http://code.google.com/p/peazip - Free, Open Source file and archive manager. Supports 7Z, ACE, ARC, CAB, ISO, PAQ, PEA, RAR, TAR, ZIP and many more archive formats...
http://code.google.com/p/threadzip - parallel threaded zip (zlib or lzo or bzip2 or lzma or whatever) compression
http://code.google.com/p/xar - eXtensible ARchiver

[DNA]
http://code.google.com/p/bedops - Highly scalable genomic feature operations
http://code.google.com/p/biolzma - A bioinformatics features based DNA data compression tool.
http://code.google.com/p/dna-compress - The DNA compression thesis
http://code.google.com/p/jasca - Just Another Sequence Compression Algorithm
http://code.google.com/p/nuca - Nucleotides Compression Algorithms
http://code.google.com/p/warpsol - Lossless compression of Illumina Genome Analyzer images

[research]
http://code.google.com/p/cudaarchiving2010 - File archiving and compression using the CUDA Nvidia framework.
http://code.google.com/p/data-compression - Sources of Website about Data Compression
http://code.google.com/p/dicosu - Space-Economical Suffix Tree Construction and Compression
http://code.google.com/p/distendere - collection of different compression / decompression algorithms in D
http://code.google.com/p/integer-array-compress-kit - Integer_compression
http://code.google.com/p/ssn-compression - neural networks compression

[codec]
http://code.google.com/p/fastlz - lightning-fast lossless compression library
http://code.google.com/p/lz4 - Very Fast Compressor
http://code.google.com/p/lzfx - A tiny, extremely fast compression library
http://code.google.com/p/lzham - Lossless data compression library with a compression ratio similar to LZMA but with much faster decompression.
http://code.google.com/p/miniz - Single C source file Deflate/Inflate compression library with zlib-compatible API, ZIP archive reading/writing, PNG writing
http://code.google.com/p/singularity-compress - Singularity data compression engine
http://code.google.com/p/slz - SLZ is a 'Simple LZ' Compressor and Decompressor Project
http://code.google.com/p/snappy - A fast compressor/decompressor
http://code.google.com/p/wilt-compressor - A compression algorithm requiring very little code to implement

[diff]
http://code.google.com/p/diffball - delta compression framework
http://code.google.com/p/xdelta - open-source binary diff, delta/differential compression tools, VCDIFF/RFC 3284 delta compression

[misc]
http://code.google.com/p/compression-code - Public Domain implementation of Adaptive Huffman Coding in C
http://code.google.com/p/huffman-compression - A simple compression program using the Huffman coding algorithm.
http://code.google.com/p/huffman-textfile-compression - Compressing text files using Huffman Coding

http://code.google.com/p/dsdecmp - (De)compressor for Nintendo compression formats
http://code.google.com/p/dszip - dsZip can compress/decompress applications (.nds files) on the Nintendo DS (TM) console.

http://code.google.com/p/jslzjb - Javascript port of the LZJB compression algorithm.
http://code.google.com/p/jssfx - Tool for creating self-extracting compressed JavaScript.