| Operating system | Developer | First release | License |
|---|---|---|---|
| Bliss OS | — | — | GNU General Public License, version 3.0 |
| GNU Guix System | GNU Project | — | free software license |
| Maemo Leste | — | — | — |
| Manjaro | Philip Müller | 2011 | free software |
| OpenBSD | OpenBSD Project, Theo de Raadt | — | ISC license |
| Ubuntu Server Edition | Canonical Ltd. | 2006 | GNU General Public License |