Greg Naçu's (commercial) C64 OS v1.0 is now out c64os.com
Submitted by Retrograde in retrocomputing (edited )
There are several interesting developments in this space but Greg's been at it for a while and maintained a very informational site about the development - if you haven't been following along, this video gives a good idea of where it's at currently: https://www.youtube.com/watch?v=PFcJOl2dgcU