If you like this option, you will probably like Isolator: http://willmore.eu/software/isolator/ http://willmore.eu/software/isolator/ By default, it puts the f

If you like this option, you will probably like Isolator: http://willmore.eu/software/isolator/ http://willmore.eu/software/isolator/ By default, it puts the focus on the current app by blurring whatever is behind it. It's pretty customizable and can do things like hiding all other apps automatically, putting a backdrop, etc. The blur effect might work better than just hiding for some people. One other nice thing is that it lives in the menu bar and can be called with a keyboard shortcut. So, it doesn't have to be 'on' at all times. edit: this or other utilities and shortcuts mentioned in the comments of the article itself