Windows 7 Start Orb Changer is a free tiny portable tool that allows you to change your Windows 7 start orb with just one click.

LogonStudio allows Windows XP users to edit, change, and apply new logon screens.

Stardock BootSkin is an application that allows users to change their Windows 2000 and Windows XP boot screens.

VistaMizer changes the look of your Windows XP desktop, making it more appealing.

In just two clicks, WinBubble will help you to Customize and Tweak your Windows Vista easily. Its features cover Customization, Security and Optimization.