š = External / third party GUI only

f = Program uses filters, (external) dictionaries and/or file preprocessing.
AC = Associative Coding
ARI = Arithmetic Coding
BWT = Burrows-Wheeler Transform
CM = Context Modeling
CTW = Context Tree Weighting
DC = Distance Coding
DM = Dynamic Markov Modeling
DMC = Dynamic Markov Coding
Huff = Huffman
LZ = Lempel-Ziv compression
LZW = Lempel-Ziv-Welch compression
PPM = Prediction by Partial Match
SF = Shannon-Fano
SR = Symbol Ranking

NOTE: All programs are tested (by me) on PC's running windows only. Believe it or not, but data compression is one of those application types where all research takes place on Windows (in stead of e.g. Linux). The last couple of years there were some major breakthroughs in compression caused by first PPM(d) and later the Context Modeling algorithms (PAQ). Unix based programs like gzip, bzip2 are tested here too, so it should be easy to compare results.

NOTE: Most programs listed here are command line compression programs (which have to be run from the "MS-DOS prompt". Some basic knowledge of the windows command line interface might be needed.