Vista SystemTweak Delones, Inc
Optimize XP. XP Tweak Suite. Optimize your PC for better performance. It protects your PC against system crashes, optimizes performance, cleans out Internet clutter, and provides quick and easy system recovery.
Windows 7 Tweak Suite. Windows 7 Performance Optimizer. Windows 7 SystemTweak features tools to optimize your system to ensure that it runs smoothly over time. It automatically detects and fixes problems with Windows and defragments your registry.
History Cleaner is free history cleaner software that helps you easily clean history tracks from your PC with one click.
Registry Cleaner scans your entire Windows registry for any invalid or obsolete entries and provides a list of the registry errors found. After that you can choose to clean list items with selection or automatically repair them all.
Duplicate Files Remover finds duplicate files and removes them automatically. This tool helps you to search for and remove duplicate data in a safe way on your PC or laptop, for example, duplicate photo files, duplicate music files, duplicate video
Disk Cleaner automatically regains plenty of disk space taken by temporary and obsolete files. One-button checkup makes sure your PC is clean.