Picturethrill is described as 'Downloads Picture of the Day from various sites and sets them as Wallpaper Desktop Background. Currently supported sites: Bing, NASA, National Geographic, and Earth Science' and is an app in the OS & Utilities category. There are more than 25 alternatives to Picturethrill for a variety of platforms, including Windows, Mac, Android, Linux and Online / Web-based. The best alternative is Lively Wallpaper, which is both free and Open Source. Other great apps like Picturethrill are Wallpaper Engine (Paid), Variety Wallpaper Changer (Free, Open Source), John's Background Switcher (Freemium) and Muzei (Free, Open Source).
Wallpaper Engine enables you to use live wallpapers on your Windows desktop. Various types of wallpaper are supported, including 3D and 2D animations, websites, videos and even certain applications. Choose an existing wallpaper or create your own !.
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.
Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art. It also recedes into the background, blurring and dimming artwork to keep your icons and widgets in the spotlight.
Get artistic masterpieces delivered to your desktop daily with the Artpip wallpaper app. All artworks are available in Ultra-HD 4K resolution. Artworks are stored on Artpip servers, meaning it takes up little space on your computer.
Wallpaper Cycler is an easy to use, yet powerful desktop wallpaper manager and changer to get rid of that boring static wallpaper on your desktop. You can change the wallpaper with a specific delay or at specific times.
Moody Desktop is a tiny (77KB), portable application for Windows (XP, Vista and Windows 7) that lets to change desktop wallpaper at a specified time interval. It is useful for people who spent many hours in front of a computer and get bored with the same wallpaper.