Dockyard is a "dock switcher" for Mac OS X. It allows you to have multiple docks and switch between them with one click.

If you want to use the Dockyard menu extra, you must first get a program like Unsanity's Menu Extra Enabler to allow it to work, as a restriction on third-party menu extras has been imposed. After you install one of these programs, just double-click on Dockyard.menu to launch it. From then on, it will always be in the right side of the menu bar. To remove Dockyard from the menu bar, command-drag it out. The menu extra requires Mac OS X v10.3 or later to run.

Dockyard now comes in three forms: a menu extra, which appears in your menu bar, Dockyard Widget, which appears in your Dashboard (Mac OS X v10.4 only), and a normal application, Dockyard Manager, which allows finer control over your docks. All three programs were created with Apple's Cocoa API, using the Objective C programming language.

Requirements:
OS X 10.3 - 10.4
Unsanity's Menu Extra Enabler or similar application.
Universal Binary