1)   Process Tamer 2.03.01
Process Tamer is a tiny (100k) and efficient utility for Microsoft Windows XP/2K/NT that runs in your system tray. When it sees a process that is overloading your cpu, it reduces its priority until its cpu usage returns to normal.

 2)   Abexo Memory Defragmenter and Process Tweak 2.4
Abexo <a href="http://www.abexo.com/ram-defrag.htm">Memory Defragmenter</a> and Process Tweak is a utility software that monitors your system memory RAM and CPU usage and tweaks the priority of programs which use too many system resources.

 3)   Mouse Tamer 2.0
Mouse Tamer allows you to record your mouse with a single click and play it back as many times as you like. You can also completely control your keyboard. For precise control of your mouse, you can create and save your own scripts step-by-step.