NDK is neuraldk's ongoing experimentation at creating a new,
modern operating system. Currently in its infancy, it's of
little use to anyone but the beginning operating systems
developer.
Included in the download is a multi-boot compatible Kernel
(which will require GRUB, or any other multi-boot compatible
boot loader to run) and a floppy disk image suitable for
VMWare, Bochs, or for dd'ing to an actually floppy (GRUB
is included in the image).
From the GRUB menu, select the Current_Kernel option. MB_Kernel
is not included in this download.
For some documentation on what's going on here, and the Multi-boot
Standard, check out my tutorial on developing NDK thus-far:
Creating A Multi-Boot
Compatible Kernel
This site contains more information on
ndk, and its progress.