‘whatshell’ script comes from ~mascheck: the rest shown are mine. Wallpaper (although not really visible) comes from the OS-Tan Collections’ gallery, and is Inu-T.
The editor on the left is Vim with an execlineb(1) plugin added. I actually use it to start my X session.
What OS is this?
Overly simplified Artix Linux :-)
Additional screenshot, just because:

Notes: I switched urxvt for Alacritty since it let me use bitmap fonts. Also, images in the screenshot are from Unsplash: go check those people out: Agnieszka Stankiewicz (desert), and Elisa Kerschbaumer (beach).
Is the font dina?
No, it is Cozette. Specifically, the Crossed Seven Vector variant.
Thank you! Gorgeous font.
The simple black and white looks lovely!
Nice, I never thought to have a really wide outer gap on i3. Now I might try it




