GtpEngine is the C++ implementation of the Go Text Protocol used in the Explorer Go program. It is available under the GNU Lesser General Public License.
Note: Newer versions of GtpEngine are included in the open source project Fuego.gtpengine-1.6.tar.gz 14 May 2008
AmiGoGtp is a modified version of the AmiGo program using the Go Text Protocol. AmiGo was one of the earliest Go programs that were publicly available with source code (and a very weak Go program). The code is also an example how to use GtpEngine for providing a Go Text Protocol interface to an existing Go engine.
Note: There is now a project page for AmiGoGtp with downloads, access to the version control and bug tracker at http://amigogtp.sourceforge.net/.