These tools will help you kill ALL running processes or open applications instantly in a click. Use them if you need to do it frequently. I too prefer to use one of these, rather than closing each app one at a time.
Terminate ALL running applications instantly
1] CloseAll is a freeware tool which helps you to close all running applications & windows instantly with one click.
2] Here is a batch file which determines all the process started by the user and terminates all these processes. It kills only the processes started by the user. These processes includes tray applications and background applications.
Using this batch file you can free up lots of RAM before starting any memory intensive application like Games or Video Encoders. You don’t have terminate each and every application to free up RAM.
This batch file cannot kill protected applications like that of AntiVirus and Firewall
To kill all running apps just download the kill.bat and double click on it.
3] KillThemAll created by a Neowin user does the same thing, but gives the user a chance to save his data. It leaves Explorer.exe open, however.
Let us know if you know of any other tools.
How to kill process instantly when Program is Not Responding may also interest you.