Overview:
LilyVM is a lightweight virtual machine which can host NetBSD, FreeBSD,
and other open source OSes. It uses partial emulation of computer hardware and
rewriting of machine instructions at compile time.
Project page:
http://sourceforge.net/projects/lilyvm/
Trac:
https://sourceforge.net/apps/trac/lilyvm/
Quick Start:
https://sourceforge.net/apps/trac/lilyvm/wiki/Quick Start