Solaris 11.4 free for non-production personal use
It doesn't even run on qemu /kvm due to very poor compatibility so not sure what Oracle is trying to achieve here - maybe get me to buy their x86 servers if they are still selling one? Or find specific old h/w in my basememt anf try it on there?If you needed dtrace or zfs luckily FreeBSD runs fine on most hypervisors and real world x86 hardware.