Systerac XP Tools 

Systerac XP Tools are an amateur and professional's tool for optimizing windows xp performance, identify problems and bottlenecks and make sure that your PC is running at top efficiency and speed. Tweak your XP for optimal results.
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DriveSitter 

Your hard disk may crash NOW! DriveSitter forecasts up to 70% of all sudden HDD crashes and monitors the HDD temperature. DriveSitter runs unnoticeable in the background constantly diagnosing the HDDs and prevents data loss.
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SIW 

The Freeware SIW is a tool that gathers detailed information about your system properties and settings. An utility that includes detailed specs for Hardware, Software and Network as well as real-time monitors for CPU and Memory Usage.
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System Energizer 

System Energizer cleans and optimizes your system for better performance. Actions taken include eliminating Internet Explorer temporary files and cookies, removing Windows & system temporary files, remove registry orphans.
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AdventNet ManageEngine OpUtils 

The AdventNet ManageEngine OpUtils is a comprehensive set of 40+ unique system and network monitoring tools. This web-based software helps IT administrators monitor, diagnose and troubleshoot their IT resources. OpUtils is web-based and very quick.
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Remote Performance Observer 

Distributed system providing detailed information on computers in a network. It performs real-time monitoring of system-critical parameters making it possible to diagnose existing and potential bottlenecks on Windows 2000/XP computers.
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