If you open more than 1 window and want to align them so that you can see all the windows at one time, you may try allSnap, which will help you to align windows (like what happen in Winamp or Photoshop).
After you install the application, all windows will snap to each other while you moving/resizing them. If you want to temporary turn off the snapping, you can press and hold the toggle key while you moving/resizing the windows (default :Alt key).
This program will not work if your application has its own custom moving/resize behavior. Below is a demonstration on how to use allSnap.
