Loraine's 4 in a Row (Popularity: )

Links to 4 in a row game type games. Includes tournaments and clubs.
Category: Games\Video Games\Browser Based\Directories

Fyrad (Popularity: )

A 'Connect Four' variant for Windows with six built-in computer opponents and network play.
Category: Games\Video Games\Recreation\Board Games

GNU Chess (Popularity: )

Contains GNUChess Atari, Chess, Computer chess and source code of these for different platforms
Category: Games\Video Games\Recreation\Board Games