Instant Registry Cleaner is an award-winning FREE tool committed itself to cleaning, repairing and optimizing Windows registry It helps your system defend against Windows crashes, slow performance and error messages.
License: Freeware
OS Support: WinXP, Win2003, Win Vista

System Optimize Expert is FREE software specialized in improving your system performance by fixing registry errors and optimizing system Act as your system doctor, this reliable utility ensures the stability and smooth running of your system.
License: Freeware
OS Support: WinXP, Win2003, Win Vista

Registry Clean Easy is a FREE reliable registry cleaning tool providing an all-in-one and quite convenient approach for PC maintenance and privacy With it you can safely scan, clean, repair and optimize your system with only several mouse clicks.
License: Freeware
OS Support: WinXP, Win2003, Win Vista

Smashing Memory Optimizer is a free Windows memory optimization and process management tool! Optimize Memory to Speed Up Your PC with Smashing Memory Optimizer.
License: Freeware
OS Support: WinXP, WinNT 4.x, Win2003, Win Vista

Windows 7 system optimizer: this is a multi-functional system performance and optimization suite for Windows 7 This collection of tools lets you supercharge your PC's performance, enhance its security, tweak and optimize its settings, and .
License: Shareware
OS Support: Linux, Linux Console, Linux Open Source, Mac OS X, Mac Other, WinXP, WinNT 4.x, WinNT 3.x, WinME, Win2003, Win Vista, Win CE, Win98, Win95, Win 3.1x, Linux Gnome, Pocket PC, Palm OS 3.2, Palm OS 3.1, Palm OS 3.0, Palm OS 2.1, Palm OS 2.0, Palm OS 1.0, Uni

Genuine Registry Doctor offers your system FREE and professional diagnoses and treatments It scans your system to identify errors and junk files and then fix them to improve PC performance.
License: Freeware
OS Support: WinXP, Win2003, Win Vista

Windows XP Cleaner is a suite of tools to clean your system; it includes Disk Cleaner, Registry Cleaner, History Cleaner, BHO Remover, Duplicate files Cleaner and Startup Cleaner this Windows XP Cleaner suite allows you to remove unneeded files.
License: Shareware
OS Support: Linux, Linux Console, Linux Open Source, Mac OS X, Mac Other, WinXP, WinNT 4.x, WinNT 3.x, WinME, Win2003, Win Vista, Win CE, Win98, Win95, Win 3.1x, Linux Gnome, Pocket PC, Palm OS 3.2, Palm OS 3.1, Palm OS 3.0, Palm OS 2.1, Palm OS 2.0, Palm OS 1.0, Uni

You no longer need to deal with the hassle of a PC that moves at the speed of a slug You can now enjoy the speed you expect from your computer by using a clean up PC registry program such as Clean PC Registry Smart.
License: Freeware
OS Support: WinXP, Win Vista, Win98

Falco Registry Doctor allows to scan your operation system's registry, find errors and fix them quickly Making your system work correctly.
License: Freeware
OS Support: WinXP, Win98

Fix registry errors,Speed up registry,Speed up your PC.
License: Shareware
OS Support: WinXP, Win Vista, Win98