Slidemate is a simple tool with which you can freely draw on your screen, anytime you want, over any Windows application.
Far from being a graphics editor in its own right, this program can be useful during presentations if you need to highlight any given area on your screen.
It can also be used to mark certain elements on the screen and then take a snapshot for later use. There are more casual possibilities as well, such as leaving a message for someone while they're away from the PC or using Slidemate to let your kids paint on your computer.
The program is launched with a hotkey and features a toolbox that shows up by moving your mouse to the right edge of your screen. However, the selection of tools is not as rich as I expected.
The Undo option, for example, lets you go back only one action.
A fun, simple tool to perform some basic free drawing on your screen, without any advanced tools or editing options.