CPU Stability Test is a free processor or CPU tester. This CPU benchmark tool can be used as a "CPU torture test" to check the stability of a computer system.
Process Explorer is a system task manager that can be used to Kill Running Tasks or Kill Running Processes that normally refuse to be killed. Process Explorer can also be used to display which running programs have a particular file or directory open.
Advanced Process Termination is a Free Portable Software that can be used to Kill Running Processes. The tool offers many different methods that can be used to Kill Processes or Terminate Running Programs (Kill Running Tasks).
Here's another great Freeware Task Manager called SterJo. It can be used for advanced process or task management and simple Trojan or Spyware detection.
DTaskManager is a portable and free Task Manager created specifically to provide advanced features that the default task managing tool that ships with Microsoft Windows does not provide. Some example functions include the ability to suspend and reactivate a process much like Linux does, select multiple processes to terminate at a time, no need for confirmation windows.
Boot Sector Explorer is a free portable low level disk editor. It is boot sector modifying software that enables you to read and write to the boot sectors of your logical drives such as PhysicalDrive0 and the Master Boot Records (MBRs) of physical drives such as C:, D: etc.
RecentFilesView is a Free Portable Tool created by NirSoft that can be used to display a list of all recently opened files. The tool works by identifying files that were recorded by the operating system and saved in the registry or as as recent folder entries.
DriveLetterView is a free and portable drive letter editing utility. This tool can be used to view drive letter assignments of all local drives, remote network drives, CD/DVD drives, and USB devices that are or have been attached to a machine.