ccGo is a program allows you to play go with gnugo on your computer or with other players on the IGS on the internet. It features a low bandwidth IGS client, GMP support, to play go with gnugo, and a SGF Go game record editor.
CGoban provides a large set of go-related services for Unix and X11. CGoban can connect to NNGS or IGS and gives a convienent graphical user interface to the server.
glGo is a prototype for a 3D Goban display, full featured SGF editor, client for IGS-PandaNet and interface for GNU Go.
GnoBang is a "get five in a row" game for the GNOME. It's a port of XmGoBang (an X11/Motif version) to GTK+/GNOME. The game algorithm itself is rather simple, and was never intended to be any good. But it's good enough to make playing it fun.
A very simple but nice GUI that allows a player to play against gnuGo. There is no support for mulitplayer games. Three boardsizes are supported.
GNU Go is a free program that plays the game of Go. GNU Go has played thousands of games on the NNGS Go server. GNU Go is now also playing regularly on the Legend Go Server in Taiwan, on the WING server in Japan, and many volunteers run GNU Go clients on KGS. GNU Go has established itself as the leading non-commercial go program in the recent tournaments that it has taken part in.
Go Siege is a transformation of the ancient Chinese game of Go into a massively multiplayer online game in which hundreds of players can compete simultaneously.
Kigo is an open-source implementation of the popular Go game. Go is a strategic board game for two players. It is also known as igo (Japanese), weiqi or wei ch'i (Chinese) or baduk (Korean).
PyGo is a Python/Tk application for studying and playing the ancient game of Go. There are lots more features planned but the current release is suitable for studying games in SGF format as well as playing local human versus human games in the absence of a board.
qGo is a Go client and full featured SGF editor, available for Linux/Windows and MacOS X. qGo code is C++/Qt.
ViZiGO is a client to play GO over internet. It will let you play GO against thousands of players. ViZiGO primarily was intented for IGS but will work also with any NNGS servers.
mGoBang is an "get five in a row" game originally written back in 1995 as an X11/Motif programming exercise. The game algorithm itself is rather simple, and was never intended to be any good. But it's good enough to make playing it fun.