Encelo's Projectz - OS Experiences

Mapux??? Yes, it's free, it's on Aminet and comes with sources.
Another UZI derived system, it's minimal, but something works, so a day I downloaded and tested it.
"It's simple but it works" was my first thought, the second was "It has got sources".

I hadn't have the time yet to hack it, but who knows, it's something I would like to do because it has simple and very small sources.