The Bee Movie operating system. Outclasses Debian, Arch, CentOS, and RHEL in every measurable way (i.e. the ability to print out the Bee Movie script in a mere 51kb bootloader).
The original code was made by CommandBlockGuy in the SciCraft Discord, I expanded it to delay character for readability and use the VGA color palette.
Both are probably not very portable so YMMV.
qemu-system-x86_64 and nasm.
I just ran sudo apt install qemu qemu-system-x86 nasm.
Run the run-bee-os.sh script. If you are using WSL or a remote X server, stick an argument and it will default to DISPLAY=:0.