A name is really important & will stick forever. So we should probably settle for the best not just for the good enough.
So far, I have been straining my brain but I found nothing (yet) that I felt was good enough even to suggest.
However there is no hurry to decide on something that can only be decided once.
With time, as the project departs from virtuality & becomes more & more concrete, more appropriate ideas for a name will probably come naturally and plentifully to us. At that time we can make a list of the names that we feel are the best suited & have a vote to isolate the winner.
What really matters is where you are going, not where you come from.
I search, I search and it's very difficult.
I come with this one : SimpleOS
Yeah I know you said not to use "OS". But I feel it easy to spell and write, and all domains are availables.
AndSweet -> from "Keep It Short and Sweet". This convey the idea, that not only our system is based on the KISS principle, but it is also not forgetting to be 'sweet' to the newbies.
What really matters is where you are going, not where you come from.