KillSwitch - KillSwitch is an advanced system monitoring tool that is apart of
WhoCrashed - WhoCrashed reveals the drivers responsible for crashing your computer.
Kiwi application monitor - Kiwi application monitor is a small program which lets you monitor your applications/processes, Windows and User activity.
BlueScreenView - Displays information about blue screen crashes occured on your system. (MiniDump Reader)
Security Process Explorer - Security Process Explorer Give you detailed information about each and every process.
WhatIsHang - Get information about hanging/freezing (stopped responding) Windows program.