Developer website: Mach Software Design
Window Tiles lives in your menubar where you quickly bring up a menu and choose how you want to organize your open windows. Tile your multiple windows vertically or horizontally. Set the two front windows to take up seventy and thirty percent of the screen, or sixty and forty percent of the screen. Set the frontmost window resize in the center of the screen, or make the frontmost window full screen; even if the window isn't resizeable! Download Window Tiles today, you'll never know how you used your Mac without it.
Mac OS X 10.5 or later