Are there any actual UNIX’s still out there and maintained. I know OSX is technically certified, and AIX still probably has support. I’m not sure if HP-UX died

Are there any actual UNIX’s still out there and maintained. I know OSX is technically certified, and AIX still probably has support. I’m not sure if HP-UX died with PA-RISC or if it ever found it’s way to today’s common architectures.