NutsOS is a small monolithic operating system running on 32-bit processor. It is written in C and assembler and was created in order to learn the low-level programming and know the basic concepts of operating systems.
MenuetOS is a fully 32 bit assembly written graphical operating system. Menuet supports 32 bit x86 assembly programming as a faster and smaller system footprint.
Menuet has no unix roots and the basic system is meant to be a clean asm based structure.