You ever wanted to move a Window easily, besides clicking on the title bar? Well, now you can. Extremely hand for working with a lot of Windows and moving things around easily.

Hold down alt (or whatever key combo you want), left click and drag. I've been looking for something like this for a long time. You can download it and learn more about it from the author's website:

AltDrag brings the window moving behavior from Linux to Windows.

Spiffy fly example: