Color Desker is an unusual and interesting desktop wallpaper manager.
And that's because the program doesn't just act like most of the competition, and switch your wallpaper occasionally to one of your favourite images. It actually works from a server-side regularly updated database of images, which means you don't have to go searching for new pictures: the author will manage all that for you.
This does of course mean you're dependent to some extent on someone else's idea of what good desktop wallpaper should be. For the most part Color Desker's images are well chosen, though. As we write there are plenty wallpapers available, mostly spectacular landscape shots, and if you'd like to sample something new at any point then just press Ctrl+Shift+W and Color Desker will update your desktop immediately.
The program also provides a right-click option to rate particular images, further improving results. Tell Color Desker that you "Love" some images, "Hate" others, and it'll adjust its recommendations appropriately.
There's also a scheduler to change your wallpaper automatically. This works well enough, but it only offers a few settings: every hour, 15, 10 or 5 minutes. We would like a little more control, like daily, on log on, or after a specified period of time.
If you'd like any easy way to locate some great wallpaper images, though, the program could still be worth a look, even if ultimately you let another tool manage how the images are used.