BootProg – FAT12/16/32 Bootsector for .COMs/.EXEs

Related: https://wiki.osdev.org/BootProg

Could somebody suggest similar thing for other architectures?

- Mostly interested in 68k but also could fit ARM, RISC-V, other popular machine.

Can't you just strap a boot sector onto a COM file? They're simple enough, right?