Many of these sorts of apps reposition windows and scale to half or quarter of the screen. What I really want is intelligent repositioning so that none of my w

Many of these sorts of apps reposition windows and scale to half or quarter of the screen. What I really want is intelligent repositioning so that none of my windows overlap. (xmonad, without resizing the windows.) Failing that, magnetic edges. Unfortunately, what I want is really the job of a window manager, or should be done at the OS level. On the Mac, there is no true user-serviceable window manager that can be replaced.