WallPerformer

WallPerformer(TM) is a software that allows you get an illiimited number of pictures from Internet and cycle them as wallpaper on your Windows Desktop in a snap.

You can choose when to change the wallpaper but also how. With it's very friendly and simple interface, you can manage and walk your pictures by hotkeys, organize them into categories and channels, use plenty of functions like the Boss-Key via shortcuts and many more cools things.
Its ability to import images from Internet allows you to automatically retrieve an unlimited number of images, sorted into categories and channels and extend your own collection.