Dockables is a cool little freeware application, or series of applications I guess, that allow you to perform simple, but commonly used tasks, directly from your dock. You just drag the task you want (for example shutting down your mac, or hiding all of your open windows) into the dock. Click on it when you want to use it and – BOOM – the action is performed.
Not a bad little piece of freeware.
Check it out by clicking here.