| AlmaLinux | Andrew Lukoshko | — | — |
| Alpine Linux | — | — | 2-clause BSD License, GNU General Public License, version 2.0, MIT License |
| Debian | The Debian Project | 1993 | GNU General Public License |
| Fedora Linux | Red Hat, IBM, Fedora Project | 2003 | MIT License |
| MVS | IBM | 1974 | proprietary license |
| OpenSUSE | OpenSUSE Project | — | GNU General Public License |
| OS/390 | IBM | 1995 | — |
| Rocky Linux | Rocky Enterprise Software Foundation | — | 3-clause BSD License |
| Transaction Processing Facility | IBM | 1979 | — |
| Ubuntu | Canonical Ltd. | 2004 | — |
| VM | IBM | — | — |