| Berkeley Software Distribution | University of California, Berkeley | — | BSD licenses |
| Debian GNU/kFreeBSD | — | — | GNU General Public License |
| Dyson | — | 2012 | — |
| Illumos | — | — | Common Development and Distribution License version 1.0 |
| MacOS | Apple Inc. | 2001 | BSD licenses, proprietary license, Apple Public Source License |
| MIPS RISC/os | MIPS Technologies | — | — |
| Nexenta OS | Nexenta Systems | — | Common Development and Distribution License version 1.0 |
| NexentaStor | Nexenta Systems | — | — |
| OpenIndiana | — | — | — |
| PANIX | NEC | — | — |
| Research Unix | Bell Labs, Ken Thompson, Dennis M. Ritchie, Brian Kernighan | — | — |
| SmartOS | Joyent | — | Common Development and Distribution License version 1.0 |
| Solaris | Sun Microsystems, Oracle Corporation | 1991 | proprietary license |
| SPARC64/OS | HAL Computer Systems | — | — |
| UNIX System III | AT&T Corporation | — | — |
| UP-UX | NEC | — | — |
| Version 10 Unix | — | — | — |
| Version 6 Unix | Bell Labs | 1975 | 4-clause BSD License, proprietary license |
| Version 7 Unix | — | — | 4-clause BSD License |
| Version 8 Unix | — | — | — |
| Version 9 Unix | — | — | — |