XP32
If you currently work with Windows XP Professional or Windows XP Home Edition, then you will certainly value this advanced performance software which will tweak your system just the way you want it. XP32 allows you to fine-tune your Windows XP and Internet Explorer easily and safely. ... XP32 hides in your system tray and keeps Windows XP optimized for peak performance. ... Included are 85 Windows Tweaks and options to improve performance. ... This 32 bit program optimizes the performance for the tasks you do most often, while saving you the unnecessary CPU and RAM overhead.
http://www.xp32.com/dl/xp32.exe - 1Mb - Download - Screenshot

SANDRA Standard
SANDRA (System Analyzer Diagnostic and Reporting Assistant) is a set of system diagnostic and benchmarking tools designed to help you keep your computer running at peak performance. It provides diagnostic, benchmarking, and performance tune-ups for different hardware devices and subsystems,... The shareware version includes 50 modules, and 20 additional modules are included in the registered version. ... The latest version includes additional modules, CPU multimedia benchmarking, and network and memory bandwidth benchmarking.
http://www.3bsoftware.com/rd/downloads/sandra.html - 2Mb - Download - Screenshot

Diskeeper Professional
It's a known fact: Fragmentation kills workstation performance and hammers user productivity. Disk fragmentation can begin to degrade performance in just a few hours. Manually defragmenting even a modest-sized network would require a small army. Fortunately, there is an answer: Diskeeper 8. ... Install Diskeeper on your entire network, and keep your computers - and users - running at peak efficiency. ... Your users' problems become your problems. ... System administrators who implement Diskeeper consistently see a drop in help desk calls, administrative time and workstation replacement costs.
http://www1.execsoft.com/us_dk80_protr.exe - 1Mb - Download

XP Smoker
XP Smoker allows you to change various settings in the Windows Registry. These settings can improve the performance for your computer drastically. You can also stop and disable useless services in Windows XP. And in the end, you will reduce subsystem bottlenecks, increase application and boot... It is the simple and straightforward way to tweak your system to peak performance. ... XP Smoker is perfect for game enthusiasts, heavy surfers, and PC users on a budget. ... Whether you use a dialup, cable, DSL, or satellite connection, XP Smoker can increase your browsing speed by as much as 100%!
http://www.xp-smoker.com/downloads/xps.exe - 4Mb - Download - Screenshot

Optimizer Rx
Optimizing utility for enhancing the performance and security of PC's. Optimizer RX is a suite of 6 robust utilities that have been designed to increase the performance and security of PC's... Correcting problems, cleaning and fixing Windows registry, deleting unnecessary files, deleting traces... Optimizer RX monitors your PC and fixes problems, giving you a smarter, better and faster computing experience; making Optimizer rx the ultimate solution for maintaining a PC's peak performance. ... Your Default System and Browser Settings may not be optimized for best performance.
http://www.horizondatasys.com/file...OptimizerRX_Single_User_Setup.zip - 5Mb - Download - Screenshot

SpeedUpMyPC
The award-winning and leading software utility that automatically optimizes and maximizes the performance of all computers within minutes. Maximize Hardware Usage for Superior Performance Fine-tune your computer hardware with SpeedUpMyPC to run at peak efficiency without the headaches of... Exceptionally Simple to Use Whether you are an expert or a novice, SpeedUpMyPC is exceptionally simple to use and does a superb job explaining "the bare essentials" about tweaking your computer for superior performance.
http://www.softcns.com/downloads/uniblue/speeduppc.exe - 72Kb - Download - Screenshot

1cleanup
Hang on there!!! Someone is looking at what you visited last night…you need to Cleanup your Internet tracks… 1CleanUp is here to give you privacy by cleaning up your Internet tracks and to speed-up your computer performance by recovering your valuable disk space. ... It not only saves your disk space by deleting Useless files and Internet tracks but also keeps your computer on its peak performance. ... If these files remain in your computer, it reduces the speed/performance - you may be sitting on a Pentium 4 machine while getting an output of a Pentium I.
http://www.marriala.net/products/1cleanup/1CleanUp.exe - 2Mb - Download - Screenshot

XP Smoker Pro
XP Smoker Pro allows you to change various settings in the Windows Registry. These settings can improve the performance for your computer drastically. You can also stop and disable useless services in Windows XP. And in the end, you will reduce subsystem bottlenecks, increase application and... It is the simple and straightforward way to tweak your system to peak performance. ... XP Smoker Pro also includes a state-of-the-art Internet Optimizer that runs a series of tests to improve your Internet connection for smoking-fast surfing no matter what connection speed you have!
http://www.xp-smoker.com/downloads/xpspro.exe - 4Mb - Download - Screenshot

TCS
This trends management program handles field data from one or more acquisition systems, or internal performance data from servers. It manages any kind of periodically updated value in a database, which can be reached by SQL query from the computer on which the program is being run. ... It can be useful also to follow the relevant parameters of a server to control and optimize the performances in peak activities periods, as can be a sustained alarms period in a supervision system. ... The daily, weekly, monthly and yearly graphics report, on selection, the arithmetic average or the weighted...
http://www.telsys.it/Download/TCS42Setup.exe - 8Mb - Download - Screenshot

! - A+ Evidence Eraser Pro
Hang on there!!! Someone is looking at what you visited last night-you need to Cleanup your Internet tracks- Evidence Eraser Pro is here to give you privacy by cleaning up your Internet tracks and to speed-up your computer performance by recovering your valuable disk space. ... It not only saves your disk space by deleting useless files and Internet tracks but also keeps your computer on its peak performance. ... If these files remain in your computer, it reduces the speed/performance - you may be sitting on a Pentium 4 machine while getting an output of a Pentium I.
http://www.pimasoft.com/downloads/pcmaxsoftware/EvidenceEraserPro.exe - 485Kb - Download - Screenshot