RamSmash 1.2.26.2007 
875 KB, system: windows, shareware, rate: 
RamSmash - optimizes computer memory by freeing wasted memory back to the computer. Works in the background to free memory to reasonable values to maintain system stability
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 PCThrust 1.2.26.2007 
868 KB, system: windows, shareware, rate: 
PCThrust - optimizes games and applications by increasing the CPU priority thread of the currently active application. Automatically de-allocates CPU priority when a new active application is selected
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 GameThrust 1.2.26.2007 
812 KB, system: windows, shareware, rate: 
GameThrust - Makes direct changes to system registry and system files to enhance memory, screen drawing, animations, refresh rates, cpu threading speeds, internet speed
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 GameHike 1.2.26.2007 
796 KB, system: windows, shareware, rate: 
GameHike - makes direct changes to system registry and system files to enhance memory, screen drawing, animations, refresh rates, cpu threading speeds
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 PCHeal 1.2.26.2007 
800 KB, system: windows, shareware, rate: 
PCHeal - makes direct changes to system registry and system files to enhance memory, screen drawing, animations, refresh rates, cpu threading speeds
more info screenshot