TurboGo - Go-playing computer program and screensaver, plus an online joseki database which replays interesting sequences. Computer Go Ladder - An informal competition between various go-playing computer programs. Many Faces of Go - The 1998 World Computer Go Champion, and ten time US Computer Go Champion. A strong Computer Go opponent. Gnu Go - A free cross-platform computer go opponent. Go++ - Go playing program. Winner of numerous international computer Go tournaments. The result of twenty years research and development. OpenGo - Intended as a workbench for prospective programmers of go engines, this program provides some simple built-in Go opponents for users to play and supports pipe and modem players. SmartGo - Go-playing program and Go game editor. Free 9x9 version available for download. Atari-Go - Plays a form of atari-Go (first capture Go) on a 10x10 board. Explorer - Explorer is a program that plays Go. Winner of the first Computer Games Olympiad in London 89. AUGOS - The Automatic Go Player. A program for Windows that can play the board game Go. AIGO - AIGO is a Go program for PalmOS. Shareware. Crazy Stone - A freeware 9x9 go-playing program. Aya - Go playing program. Aya was placed 5th in 21 Century Cup in Canada.