PUBLIC MARKS from simon_bricolo with tag screen

allows you to quickly and efficiently "divvy up" your screen into exact portions

This application will let you resize and move your windows without having to using a mouse. Following are some of things you can do with the Shift It: * Shift the focused window to left/right/top/bottom half of the screen. * Resize the focused window to fill the whole screen. * Move the focused window to the center of the screen. Shift It is a great tool that lets you organize your windows. Now you can read documents side-by-side without having the pain of manually resizing the windows.

SizeUp allows you to quickly position a window to fill exactly half the screen (splitscreen), a quarter of the screen (quadrant), full screen, or centered via the menu bar or configurable system-wide shortcuts (hotkeys).