John’s Background Switcher (or JBS for short) periodically changes the wallpaper on your computer (like every hour or every day) to something interesting. JBS sits in your system tray (down by the clock) and changes your background at the time interval of your choosing.
Wanna download automatically every day a new and beautiful wallpaper for your Windows desktop?
My Daily Wallpaper automatically download and change your wallpaper after Windows logon or every X hours!.
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.