Removing files from your system is a lot harder than installing them. Even though when you uninstall a program with its own uninstaller it may leave leftovers behind. (like empty directories, log files, registry entries etc.) Uninstall Manager is the program that lets you safely remove all unwanted files and return your system to its original state.

Remove
A full-featured uninstaller for removing shown and hidden applications and entries from the Windows' Add/Remove Programs list in the Control Panel. In addition to the standard uninstall option, it allows you to modify, backup, and restore entries.

Ashampoo PowerUp XP Platinum 2
Tune up your computer like a pro in seconds!

Ashampoo UnInstaller 4
Improved Uninstaller and Windows Cleanup Toolbox

Ashampoo WinOptimizer Platinum Suite
The ultimate Ashampoo Windows® cleanup tool!

Screen Saver Center
Do you want to see all of your screen savers at once and choose the best? Use Screen Saver Center to preview and configurate screen savers. In addition, you can start default screen saver with double click and lock-up Win XP or Win 2k.