GNU Go

GNU Go is a Go‐playing program. It has a built‐in text based interface (shown in this article image), but it can also be used with graphical frontends like like GoGui, qGo and CGoban 1. As of May 2015 the latest stable version of GNU Go is 3.8 released on 19 February 2009. It has been licensed under the GPLv3 since 24 October 2007 in CVS.

GNU Go also provided support for online gaming with the GGZ Gaming Zone service. Along with support for GGZ, it played on Go servers like NNGS Go, Legend of Go server hosted in Taiwan, and the WING server hosted in Japan.