With Zazen, you will see a list of running Applications in your Menu Bar. From this menu, you are able to switch between your Applications, Quit your Applications, Force Quit your Applications, or use an Application in Concentration Mode.
What is Concentration Mode, you ask? Concentration Mode is the ultimate way to focus on any application. The screen will fade out, and you will see the Application you chose to work with in a bright, thought-provoking way you never thought of before.