Guide about how to install FreeBSD, the minimum hardware requirements and supported architectures, how to create the installation media, etc| FreeBSD Documentation Portal
The bhyve hypervisor has been ported to Illumos and provides an altervative to KVM. SmartOS created an OpenBSD image but it’s quite old. I don’t know (yet) how to upgrade or make more up-to-date images. But I could manage to run OpenBSD 7.4 on OmniOS.| www.tumfatig.net