Dockyard is a "dock switcher" for Mac OS X. It allows you to have multiple docks and switch between them with one click.
Dockyard now comes in three forms: a menu extra, which appears in your menu bar, a widget, which appears in your Dashboard (Mac OS X v10.4 only),
and a normal application (called Dockyard Manager) which allows finer control over your docks.
All three programs were created with Apple's Cocoa API, using the Objective C programming