This blog may focus on client management, but this is the other kind of windows management…
Magnet is a neat app that will help you resize windows to certain fractions of the screen: half, quarter or third size. You just drag a window to the edge of screen and Magnet will suggest a size to resize it to. Very useful if you want to tile multiple terminal windows or split the screen among more than two applications.
It is on sale right now for only US$0.99, 80% off the normal price.