I like ShiftIt (free) for basic window management. I have opt+ctrl+cmd+[arrow] set to move my active window to that part of the screen. Ie, left arrow has that

I like ShiftIt (free) for basic window management. I have opt+ctrl+cmd+[arrow] set to move my active window to that part of the screen. Ie, left arrow has that active window take up the left half of my screen. I then cmd+tab to another window and put it on the right side. Super quick for my window management needs.