I have to advocate for my favorite window management tool: Zoom/2 (http://www.coderage-softwar.... It lets you easily move and resize windows with the mouse in almost-the-traditional way, except without having to bother to carefully select the menu bar or the corners/borders of the window, which saves on mouse/trackpad movements, and it also works without bringing the window to the top. It's good when you are not sure where exactly you want that window, and want to shift it around a bit before settling on location/size. I have both Zoom/2 and Divvy running, and use whichever one is more appropriate for the moment.