I've been using Cinch, which does a similar thing (albeit it doesn't have quarter sized windows) by mimicking the abilities of Aero Snap in windows (drag to the

I've been using Cinch, which does a similar thing (albeit it doesn't have quarter sized windows) by mimicking the abilities of Aero Snap in windows (drag to the sides to make it half the screen, drag to the top to make it full screen).