short descripton where to get type of software
Chess playing Programs      
Chessmaster 6000 very strong, many features, nice graphic Chessmaster commercial
Hiarcs 7.0 very strong, functional interface Hiarcs commercial
Crafty PPC 17.12 very strong, no graphical interface Crafty freeware
SigmaChess 5.1 strong, good interface, useful features Sigmachess shareware
MacChess 5.0.1 strong, good interface MacChess freeware
ScreamerChess b54   ScreamerChess freeware
Gnu Chess   GnuChess freeware
EtuChess promising new chess program :) under development  
RChess 2.2.2   RChess  
Vanessa Chess   Vanessa Chess  
Virtual Chess   Virtual Chess  
       
       
others      
Exa_Chess 2.1 chessdatabase with enginesupport   commercial
Fixation 2.0f2 ICC and FICS   freeware
MacPGN 3.0 program that can handle pgn ;-)    
Chessworks 2.3 program to play internet chess (not ICC/FICS) chessworks