Focusing attention on presentation
Often in a presentation, we need to show a demo to the audience. A live demo is often much more appreciated than recorded cast. But the problem with live demo is you will be forced to show the entire screen of your computer. If you want to focus the attention to a window or a point, you need to dim the rest of your screen.

Clutter Cloak is the tools for your Windows machine, whereas Doodim does the exact job for the Mac. Both are free.
If what you need is somewhat different, you may want to see Mousepose. Instead of a static rectangular area, Mousepose simulates a dark room with strong light to a certain place pointed by your mouse.

BTW, Mousepose is available as bonus if you finish the MacHeist II stage 2. It’s still running now, so you must hurry if you want one.

