Cross-platform desktop customization software
ScreenPlay is a free personalization software developed by Elias Steurer. It is a utility app that lets users change the look of their desktop home screens with various wallpapers and widgets. It supports HDR content, up to 4K resolutions, and will work seamlessly with ultra-widescreen monitors straight out of the box.
A new look
You can think of ScreenPlay as an open-source alternative to another popular desktop customization solution, Wallpaper Engine. It boasts a nice collection of static and live wallpapers with seamless integration with Steam Workshop. Alternatively, you can opt to upload your media. As mentioned, it also supports widescreen and high refresh rate 4K monitors.
This utility tool also allows users to add widgets to monitor core system stats, including CPU, RAM, and Storage, which you can design using a built-in QML widget wizard. However, note that you currently can't monitor GPU and Network information.
Potentially solid alternative
To sum up, ScreenPlay is a solid option if you're looking for an easy way to personalize your desktop home screen with a free open-source solution. It's easy to use, offers a nice selection of wallpapers, and lets you add widgets for system monitoring. Check it out and see for yourself.