Webshots Desktop is the client to the former Webshots Desktop Site which is a service dedicated to providing high quality images to users. It is a free, but ad-supported photo management application that's fun and powerful.
Here is a screenshot to illustrate the features and user interface of this application:
Bing Wallpaper
Lively Wallpaper
DisplayFusion
John's Background Switcher
Kiwi Random Wallpaper