John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Great Wallpapers For iPad - Great Wallpapers is an all-in-one iPad application that comes with high-quality images from a plethora of categories.
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.
Peppy Wallpapers - New free wall app with some lovely minimalist designs.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
Wallpaper background - Wallpaper background is another free to use mobile personalization application that lets you enjoy more than 10 million high-quality wallpapers, consists of multiple categories such as Nature, Movies, Places, Flavors, and Games etc.