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windowshade

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WindowShade lets you hide the windows that are obscuring your view temporarily -- completely hassle-free and unobtrusive for your eye. Just by double-clicking the window titlebar, or pressing the Shift or Control key twice, the window will roll into just the window title bar, letting you see and interact with the windows located below the current window. Ideal for quickly glancing on what's happening below the current window or to get the top window out of the way without losing control of it.
Another feature WindowShade offers is Make Window Transparent. By activating it, your window will become partially transparent, so you can see through it while keeping the complete control over its controls and buttons!