WindowBlinds is a software application developed by Stardock that allows users to customize the appearance of their Windows operating system. It enables users to change the look and feel of their desktop by applying various themes, which can alter window borders, buttons, and other interface elements. The software supports a wide range of themes created by both Stardock and the user community. Users can easily download and install these themes, providing a personalized experience that enhances the visual appeal of their computer while maintaining functionality.