Absolute Uninstaller, as the name suggests, it is an application which gives a perfect uninstallation, it can uninstall a program completely from computer, including the installation directory, registry items, etc., in order to prevent your computer from becoming slower and slower because of junk files.

Startup Delayer is a free startup items management application. It allows to modify (add, delete, delay or disable) the startup items easily, moreover, it can set up each program's startup sequence, in order to prevent them from leaping to the start with the result that causes system CPU usage too high and directly makes system boot slowly.

These two free apps are Piriform CCleaner and Auslogics Disk Defrag, i call them "CC" and "DD" for short, because i usually run them by typing "cc" and "dd" in the "Run" box to call them. (surely, this needs you change the default "Path" value in the "Environment Variables")

NIST (National Institute of Standards and Technology), it seems that the time around the world is all verified from there, and the Windows built-in Internet time is updating from there all the time, too.

Process Explorer is one of the famous Sysinternals' products - enhanced Task Manager, its biggest characteristic is killing any process at once, even including the key system processes, this is too far behind to catch up for the Task Manager.