Gtrayicon is a generic tray icon for GNOME. It defines two actions: activate
and deactivate, that are alternated by clicking in the tray icon. You choose
what commands to run on each action. You can also define each action's icon and
a custom menu that is shown on left click. A sample menu file is included with
the package. Check /usr/share/doc/gtrayicon-1.1/sample.menu for more info.