FlySketch
Another amusing and handy little tool for your spring cleaning attention is FlySketch from the developers who call themselves, oddly enough, Flying Meat.
It's a screen capture program with some lightweight drawing tools. In other words, it's exactly what you need, when you want to explain something that's happening on your screen. Just pop up Flysketch, position its window over the interesting bit of the screen, a push the camera button: whatever was on the screen is now on your canvas. Grab the highlighter tool, circle the point of interest, and paste it all into email or Tinderbox. Just $24.95.