PUBLIC MARKS with tags software & screen

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).

ScribbleScreen is a presentation tool allowing you to write directly onto the screen

Screen Spanning Doctor