A few i had in mind (from my bookmarks): Cloudron, Sandstorm, HomelabOS, libre.sh, UBOS, Unraid, Helm, CasaOS, servers.coop's Capsul. In my opinion, in those virtualized solutions Sandstorm is the only one that's not a simple GUI for docker/LXC and had some actually interesting research going on (especially in terms of security). That's for generic selfhosting solutions, and i personally have no strong opinion about these as i'm more interested about bare-metal solutions that work on low-end hardware (Freedombox/Yunohost/LibreServer).
To this list you can add the free ansible/docker recipes used by friendly hosting coops such as webarch.coop or disroot.org. I'm guessing many other CHATONS.org/Libreho.st federation members also publish their recipes, but i wouldn't know for sure.
I don't count ChromeOS as anything as my understanding is it's just a web browser with a custom kernel? I may be missing something as i've never used it, and if i don't have the source code and/or have to pay Google a single cent to use it i most probably will never try it out.
Personally, when it comes to desktop virtualization, i'm very happy with QubesOS. It's not designed for graphics performance, but it's to my knowledge the only distro providing decent security for multi-VM graphical workloads, and their research keeps going!
Which ones do you have in mind? Would you count ChromeOS as one of those, too?