Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.