You don't know which application is running?
You open too many folders and web pages?
It does not matter! You only need press ⌃⌥⌘Q (control + option + command + Q) to quit them all!
If your computer crashes, Please press ⌃⌥⌘R (control + option + command + R) to restart the computer!
So, it's the "A Key Quit".
In addition, you can use the "Preferences ..." menu to open the settings panel, and then select the applications you need to quit, at the same time set the "A Key Quit" whether the Open at Login.
And when you use the "A Key Quit" to sleep, restart, shut down and log out the system, it will first quit all applications.
A Key Quit (cn.winat.a-key-quit) is a Mac software application that has been discovered and submitted by users of Software.com.
Operating System: Mac
Default Install Path: /Applications/A Key Quit.app
Minimum OS version: 10.7
Copyright: Copyright (c) 2012 FizApp. All rights reserved.