| A2 | ETH Zurich, Niklaus Wirth | — | BSD licenses |
| AdJ | — | — | — |
| AgiliaLinux | — | — | — |
| AlmaLinux | Andrew Lukoshko | — | — |
| Alpine Linux | — | — | 2-clause BSD License, GNU General Public License, version 2.0, MIT License |
| ALT Linux | ALT Linux Team, ALT Linux | — | GNU General Public License, version 2.0 or later |
| AmayaOS | — | 2014 | GNU General Public License, version 3.0 |
| Android 16 | Google, Open Handset Alliance | — | — |
| Android 17 | Android Jetpack, Open Handset Alliance | — | — |
| Android Marshmallow | Open Handset Alliance, Google | — | free software, Android Open Source Project |
| Antergos | — | 2013 | GNU General Public License |
| AntiX | — | — | GNU General Public License |
| AOSC OS | Anthon Open Source Community | — | — |
| Arch Linux | Allan McRae, Anatol Pomozov, Aaron Griffin, Felix Yan | 2002 | GNU General Public License |
| Astra Linux | RusBITech | — | GNU General Public License |
| AstraOS | — | — | — |
| BackBox | — | — | GNU General Public License |
| BareMetal | — | — | BSD licenses |
| Barrelfish | — | — | MIT License |
| Black Lab Linux | — | — | — |
| BlackArch Linux | — | — | 3-clause BSD License |
| BlackPanther OS | — | — | — |
| Bliss OS | — | — | GNU General Public License, version 3.0 |
| Bodhi Linux | — | — | GNU General Public License |
| Calculate Linux | — | — | GNU General Public License |
| CentOS | — | 2004 | GNU General Public License |
| CentOS Stream | Red Hat, IBM | 2019 | GNU General Public License |
| ChromeOS | Google | — | proprietary license |
| ChromiumOS | Google | 2009 | BSD licenses |
| Container Linux | — | — | Apache License |
| CrunchBang Linux | — | — | GNU General Public License |
| Darwin | Apple Inc. | 2000 | Apple Public Source License |
| Debian | The Debian Project | 1993 | GNU General Public License |
| DragonFly BSD | Matthew Dillon | 2003 | BSD licenses |
| Dragora GNU/Linux-libre | — | — | GNU General Public License |
| Dyson | — | 2012 | — |
| Edubuntu | Canonical Ltd. | — | GNU General Public License |
| Elementary OS | — | — | GNU Lesser General Public License, GNU General Public License |
| EndeavourOS | — | 2019 | — |
| Enso OS | — | — | GNU General Public License |
| EulerOS | Huawei | — | — |
| Exherbo | — | — | — |
| Fedora Linux | Red Hat, IBM, Fedora Project | 2003 | MIT License |
| FreeBSD | — | 1993 | 2-clause BSD License |
| Frugalware Linux | Miklós Vajna | — | GNU General Public License |
| Gentoo Linux | — | — | GNU General Public License |
| GNU Guix System | GNU Project | — | free software license |
| Gobuntu | Canonical Ltd. | 2007 | GNU General Public License |