The eXtensible SauerBraten Server is a protocol compatible Saurbraten server that is extendable through the use of Python plugins. It is open source software released under the GNU Public License.

 Configurable  Extensible  Lightweight
 Nearly every aspect of the server is configurable in each plugin's ini-style configuration file.
 Using the plugin interface, new features can be added to the server simply by droppnig a folder in place.
 Due to the event-driven design, all features make use of the same server event loop.