JS HTML5 version of X2Go Client is available now.
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 KDrive is a kdrive X-Server based on Xephyr
There exist many variants of X2Go Session Brokers in productive business environments. Most of them have been programmed and deployed by http://phoca-gmbh.de. Since 2013 the X2Go project is proud to offer a public X2Go Session Broker implementation that is available as tarball and through our package archives (and licensed under AGPL-3+).
Learn how to write your own X2Go Session Broker:
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.