Forge is a tool for creating bare-metal applications with metal.
Install with cargo install forge.
Create a new project with forge new <project-name>
Build with forge build.
Run with qemu-system-x86_64 -cdrom build/x86_64.iso.
If I have time, I'll add more architectures.
Caveats:
grub-mkrescue (apt install xorriso), ld, and xargo installed into the path.