TUNES

LispOS Project - Goal: reflective OS based on LISP. Mostly merged with TUNES. No code, but many ideas politely presented in a fascinating archived mail list. Mail list archives.
lists.tunes.org/archives/lispos/

Ultra Programming Language Project - Goal: create an advanced open source language and compiler. Interesting mail archives. Allied with TUNES.
users.chariot.net.au/~matty/ultra/

UniOS: A Concept OS - Merging with TUNES. Some useful ideas with very clear, well written explanations, and links. No code.
tunes.org/~unios/