Heavy multi-tasking kills your concentration. All that tweets, emails, chat messages and lolcats staring back at you in the background. They strive for your attention. And you only have that much of it. Don’t let yourself drown in scores of open windows. Hiding, switching, looking for the right one, more hiding, more switching. Calm down, breathe in, breathe out, launch HazeOver and finally focus on what’s you’ve been up to. HazeOver automatically highlights an active window when you switch from app to app or to another window. The less important things gently fade away in the background, improving your attention. As our App of the Day, all our regular readers…