I have really mixed feelings about Unclutter for OS X (US$2.99). On the one hand, it's a pretty cool idea. The app offers a pull-out "drawer" on your desktop that lets you store files, make notes, and view your clipboard. On the other, parts of the app are unintuitive to use and could stand some design improvements to enhance the user experience.
To begin with, I struggled to get the app to respond until I realized that you could not just click and drag from the top of the screen. I needed to use the scroll wheel to entice the application window to appear. Once I mastered that, opening the app became an easy process.
