The Ultimate Modern Hobby OS: Anos

Building an OS from bare metal is brutal. Most devs quit at the bootloader. Meet Anos. It’s a modern, non-POSIX microkernel OS for x86_64 and RISC-V. It handles preemptive multitasking across 16 CPUs with strict capability-based security. The crazy part? It runs functioning hardware drivers entirely in userspace using zero-copy IPC, and even has its own custom GCC toolchain. It’s a masterclass in low-level architecture and a massive solo achievement.