From Wilz Modz:
Have you ever had trouble explaining your idea on a computer to someone? Have you ever simply wanted to mark on your screen for illustrative purposes? Have you ever wanted to sketch an equation or figure to the side of your notes? Well now you can. With Sketch It! you can draw on top of any program on your computer including your desktop. Sketch It! will allow you to turn your ordinary computer into a virtual drawing surface. With a variety of features from changing the appearance of the line your drawing including size and color to placing the screen's image into the clipboard or saving it to a file it's all there. One of the best features about Sketch It! is that you'll hardly notice it until you want to use it since it stays on the task bar waiting for you. Sketch It! is a perfect tool for a variety of individuals and professions.
Teachers: Use Sketch It! to point out items of interest in notes charts and graphs images and other illustrative material. Students: Use Sketch It! to emphasize portions of your notes or draw equations and other figures directly onto your screen. Professionals: Have a presentation coming up? Use Sketch It! to quickly and easily point out key points in your slide show. The possibilities and uses for Sketch It! Are only limited by your imagination.