TweakRAM 

TweakRAM is a handy memory optimizer tool that will keep your computer running faster and efficiently. It increases your system performance by making more memory available for your applications and the operating system.
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PC Power Optimizer Lite 

PC Power Optimizer Lite has several categories and sub modules to optimize your Windows XP. You can customize menu appearance, Start menu and Taskbar, see system files, folder and change their settings. It provides privacy and security of high level.
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