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X2Go Client is also available as a browser plugin. With this plugin your web browser can be turned into an X2Go Client very easily. The session configuration can be embedded into the HTML file initiating the plugin startup.
X2Go Admin Center is a Qt4 GUI project enabling the administration of users, groups, hosts, X2Go sessions and more (plugins) with the help of a graphical interface. It is (as of 2013-03-15) in the stage of early development.
A session broker is a tool to provide session configurations to an X2Go client machine. The X2Go Session Broker can be an http(s): server or an ssh: server. The public X2Go Session Broker implementation is (as of 2013-03-15) rather fresh and certainly needs some more time to mature.