If there's one good thing that Windows 7 users have built-in that Mac users don't, it's window snapping. In Windows 7 you can drag a window to the top of the screen to maximize it, or to the left or right side of the screen to make it fill half the display.
BetterSnapTool is window snapping for OS X on steroids. Whether you want to snap and expand to full screen, half screen (either horizontally or vertically), one-third of a screen, quarter screen, centered or eve
