Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use. It can automatically download wallpapers from various online sources, allows rotating them on a regular interval or on demand, and provides easy to use ways to separate the great images...
QuickWall was initialy launched as a wallpaper app that would set wallpapers directly from the commandline. Later due to a lot of requests from users , a theme option was added which uses pywal to generate themes from the wallpapers.
This application brings a little variety onto your desktop! It changes your desktop wallpaper automatically after a preset period of time. At the moment it works with a Gnome and Xfce based system. Maybe other desktop environments will be supported in the future.
BackStory Wallpapers uses the photos in your Photos library to create beautiful backgrounds for your desktop. Select an arrangement, some albums, and maybe a filter or two. Then set the timer and let BackStory show you collages of images.