SerenityOS is another one which was posted recently:

https://news.ycombinator.com/item?id=29270776

Video demo:

https://vimeo.com/641406697

SerenityOS is great too. But it doesn’t run on real hardware yet I think?

Apparently it worked on specific hardware configurations a couple years ago: https://www.youtube.com/watch?v=sT-ME3PsKtc

In terms of general minimal-viable support, that's probably hit-and-miss (perhaps around where Linux distros were at in the early 90s - probably worked, except for everywhere it didn't), particularly with the increasing ossification and variability of BIOS/legacy emulation in current-era systems.

I remember one called SkyOS as well - it was really far along, probably killed by the lack of driver support. Unfortunately it's site seems to no longer exist.

Here's the latest archive of it I could find: https://web.archive.org/web/20171014135312/http://www.skyos....

Also it's wiki page: https://en.wikipedia.org/wiki/SkyOS

> I remember one called SkyOS as well - it was really far along, probably killed by the lack of driver support. Unfortunately it's site seems to no longer exist.

Here is the LinkedIn page of the main developer (Robert Szeleney) of SkyOS: https://www.linkedin.com/in/robert-szeleney-26902738/

In 2009, he founded Djinnworks: https://djinnworks.at/

You can find Robert Szeleney's email address on https://djinnworks.at/team

Considering the fact that according to the German wikipedia page (https://de.wikipedia.org/w/index.php?title=SkyOS&oldid=21527...), the last version of SkyOS is from 2008, I don't believe that SkyOS was killed because of a lack of driver support, but rather because the main developer simply had to make money. But feel free to ask him directly, you now know how you can.

Yes, and several others since.

Does anyone use it?