SINGULART - World's Leading Online Art Gallery
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.
DeviantArt muro - DeviantArt muro is an HTML5-powered drawing application that lets you create artworks using the simple touch of your fingertips.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
9 GANS - A unique art gallery that refreshes every hour
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads