1)   BoostXP 2.00
Boost XP is not only a tool to keep your PC smooth fast and error free but its also a personal manager. You definitely need it to keep your machine hale and hearty but also it will save a lot of your time by managing and handling a lot of things.
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 2)   O&O Defrag Server Edition 10
O&O Defrag 10 Server Edition is not only the ideal, specially-created defragmentation software for servers - it also contains the O&O Defrag network management. This tool allows you to distribute and control O&O Defrag over your entire network.
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 3)   Auslogics Disk Defrag 1.4.13
Auslogics Disk Defrag will defragment your computer disks and speed up your system. It's designed for fast optimization of today's modern hard disks. Get the maximum performance out of your expensive hardware investments. And it's absolutely FREE.
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 4)   Advanced System Optimizer 2.10
ASO v2 is a powerful system performance and optimization suite. It lets you supercharge your PC's performance. You can enhance security, beautify and optimize Windows, tweak settings, customize screens, and make Windows work the way you want it to.
optimize, boost, manage, stability, maintenance, backup, tweak, clean system, disk defrag, increase performance,

 5)   Advnced Vista Optimizer 2008 1.00
Advanced Vista Optimizer 2008 is a complete set of utilities and tweaks to manage all areas of Windows Vista/XP. This special product will allow you to perform all those operations on your OS which were impossible using Windows interface.
optimize performance, manage backup, tweak, increase system speed, boost, clear registry fragments, clean, disk defrag, startup, maintenance,