Add Sprite to your list; it's not in development anymore, but it was up to production quality.
- open-source operating systems Edmund GRIMLEY EVANS
- Re: open-source operating systems Thomas Bushnell, BSG
- Re: open-source operating systems John Tobey
- Re: open-source operating systems Edmund GRIMLEY EVANS
- Re: open-source operating systems M.C. Vernon
- Re: open-source operating systems Christopher R. Barry
- Re: open-source operating systems Guy A. Schiavone
- OSKit. Re: open-source operating systems Christopher R. Barry
