SurfaceOS

SurfaceOS is an experimental x86_64 hobby operating system written in freestanding C++. It features a custom UEFI bootloader, preemptive SMP scheduling, a virtual file system with FAT32 support, multiple console screens, and an application SDK. It can be built using an OS cross-compiler toolchain and tested inside QEMU or booted on bare metal from a USB drive.

From the repository: “A small my own OS :)”