| Akaros | — | — | GNU General Public License, version 2.0 |
| AsteroidOS | — | — | — |
| Clonezilla Live | — | — | — |
| Darik's Boot and Nuke | — | — | GNU General Public License |
| Embeddable Linux Kernel Subset | — | — | GNU General Public License |
| EmuTOS | — | — | GNU General Public License, version 2.0 |
| FreeNOS | — | — | GNU General Public License, version 3.0 |
| Gentoo GNU/Hurd | — | 2026 | GNU General Public License, version 2.0 |
| Gentoo/FreeBSD | — | — | — |
| GNU Anastasis | — | — | GNU Affero General Public License, version 3.0 or later, GNU General Public License v3.0 or later |
| GrapheneOS | Daniel Micay | 2016 | MIT License, GNU General Public License, version 2.0 |
| IndLinux | — | — | GNU Lesser General Public License, version 2.1 or later, GNU General Public License, version 2.0 |
| KISS Linux | — | — | — |
| KolibriOS | — | — | GNU General Public License, version 2.0 |
| LibreCMC | — | — | GNU General Public License, version 2.0 |
| Lilith | — | — | MIT License |
| MeeGo | Linux Foundation, Intel, Novell, Nokia, AMD | — | GNU General Public License, version 2.0 or later |
| Mezzano | — | — | MIT License |
| MIDIbox Operating System | — | — | — |
| Minoca OS | — | — | GNU General Public License, version 3.0 |
| MonaOS | — | — | MIT License |
| NuttX | Apache Software Foundation | — | Apache License, Apache Software License 2.0 |
| OreoOS | — | — | MIT License |
| Orthanc | — | — | GNU General Public License, version 3.0 |
| Os.bf | Brainfuck Enterpise Solutions | — | WTFPL |
| Proxmox Backup Server | — | — | GNU Affero General Public License, version 3.0 |
| Proxmox Mail Gateway | — | — | — |
| Proxmox Virtual Environment | Proxmox Server Solutions GmbH | — | GNU Affero General Public License, version 3.0 |
| Publik | — | — | GNU General Public License, Affero General Public License |
| Rockbox | — | 2002 | GNU General Public License, version 2.0 |
| Sigma File Manager | — | — | GNU General Public License v3.0 or later |
| Thinstation | — | — | GNU General Public License |
| TWRP | — | — | GNU General Public License |
| UCS@school | Univention | — | GNU Affero General Public License |
| XCP-ng | — | — | GNU General Public License, version 2.0 or later |
| YunoHost | — | — | GNU Affero General Public License, version 3.0 |