MercuryMover is a handy Preference Pane-based tool for keyboard junkies, helping you quickly move and resize windows without resorting to a mouse or trackpad. MercuryMovers functionality and interface is extremely simple: you invoke the apps heads-up display with Control-Command-Up Arrow, and then with a series of intuitive keystrokes you can center, push aside, and resize windows (1, 10, or 100 pixels at a time, or to the edge of the screen), all from your keyboard, even across multiple displays. The latest version adds MercuryMover's best feature: the app understands that we often resize and move windows in the same way, so it lets you assign shortcuts to particular window sizes and positions. We would love to see a less restrictive trial version (currently 100 uses, possibly not enough for what could otherwise become a cant-live-without app) and perhaps a lower price, but MercuryMover is still extremely useful for anyone who is hoping to increase efficiency by avoiding their mouse.
From Helium Foot Software:
MercuryMover reduces the friction you feel when you use your Mac. With MercuryMover, you can move and resize windows on your Mac from the keyboard, positioning them precisely where you want. By shunning the slow and imprecise mouse, MercuryMover empowers you to work faster and play more.