Dock Spaces is a nifty little utility that allows you to have up to ten different Docks. What makes it different, however, is its integration with OS X's built-in Spaces virtual desktops. Now you can have a different Dock in every Space that automatically switches when you move to the new Space.
With Dock Spaces you can use different Docks to give different Spaces a kind of functional utility. For example, you could put all your office type applications in one Space and all your graphics editing applications in another, etc. It can also make it easier to tell exactly which Space you're presently in.
Dock Spaces is a free download from Patrick Chamelo (donations requested) and naturally requires Leopard.
[via MacBreak Weekly]