Plugin Interfaces > Custom Site-Wide Menus
IPluginAdminMenu: Add a custom link to the bottom half of the "Settings" menu (containing administrative options) on the upper right of the FogBugz interface. (Example)
IPluginSettingsMenu: Add a custom link to the bottom half of the "Settings" Menu (containing per-user settings) on the upper right of the FogBugz interface. (Example)
IPluginExtrasMenu: Add a custom link to the "Extras" menu at the top of the FogBugz interface. (Example)