John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
PIXEO - PIXEO is an easy-to-use app that provides photographers with a simple method of recording, snapping, and sharing the ideal photographic sceneries in the world.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
DailyPic - You like the Bing Picture of the Day?
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.
OmmWriter - Ommwriter is a simple text processor that firmly believes in making writing a pleasure once again, reinvindicating the close relationship between writer and paper.