Atalasoft Screen Cut sits in your system tray waiting to spring to life. When you double-click it, it will put a gray transparency over your screen. Now just freehand draw a region, and when you let go of the mouse, the area you selected will be put as a PNG into your clipboard, ready for you to paste into an e-mail, IM or wherever. You can access settings by right-clicking the icon. Choose the shape you'd like to cut and the format to put onto the clipboard.