WindowMizer is an application that will "roll-up" a window like a windowshade.
WindowMizer quickly reduces the height of a window allowing you to see behind it without losing your place or focus. A simple double-click on the title bar of a window, and the window will roll-up like a window shade. The window is now out of the way yet easily accessible. To restore a window, simply double-click the title bar and the window will unroll. Window-shaded windows reduce screen clutter and help keep an organized desktop when working with a multitude of windows and limited screen space.
If an application does not allow its windows to be reduced to the height of the title bar, then WindowMizer minimizes the window to the Dock and leaves a placeholder title bar on the screen. Double-clicking the placeholder title bar will restore the original window from the Dock. No need to navigate to the Dock to find the window you just minimized... it's exactly where you left it!