Astral OS
AstralOS is a simple OS made in C++. It includes a lot of features, like a hybrid kernel (eventually) and a multi partition os. The code contains comments showing how everything works and which parts are from other sources. Here is a QEMU VM Powered By ktock/qemu-wasm to showcase the OS. It will take a while to load.
To run the demo, type in:
fs0:
cd efi/boot
BOOTX64.EFI