Acquire backgrounds from Reddit. Should work cross platform.

App that automatically downloads and manages your wallpapers

1337walls Roulette automatically downloads a random wallpaper from (http://1337walls.w8l.org/), blurs the image (optional) and sets it as your wallpaper.

Script to update wallpaper every hour.

Background wallpaper slide show maker for Ubuntu

The front wallpaper to your monitor(s)

Automatically updates the macOS desktop background to the National Geographic Photo of the Day, every day.

An automatic random background setter for LightDM GTK greeter

Wallpapers obtained by Reddit Image Crawling

Background rotator with options to curate the images

🖼️ Automatic Wallpaper Slideshow with Advanced Features