You can select intervals of 2, 10 or 20 minutes, guided relaxation or not.
Studies how that meditation can improve your memory, focus, and productivity at work, as well as help you with stress, pain and other issues in general.
Calm.com is also available for iPhone! Get calm.
There is also has a quick break website from the same creators called http://donothingfor2minutes.com/. When you go to the site, it contains a countdown clock for 2 minutes and the sounds of beach waves with a static photo. You are not allowed to touch your keyboard or mouse or FAIL comes up on the photo and the clock stops counting down.