| Flyme | Meizu | — | GNU General Public License, Apache License |
| Glaze OS | — | 2017 | — |
| Hackable:1 | — | — | — |
| HarmonyOS | Huawei | 2019 | — |
| IodéOS | — | — | Apache Software License 2.0, GNU Affero General Public License, version 3.0 |
| IOS | Apple Inc. | 2007 | proprietary license |
| IOS 10 | Apple Inc. | 2016 | end-user license agreement |
| IOS 11 | Apple Inc. | — | end-user license agreement |
| IOS 12 | Apple Inc. | — | — |
| IOS 13 | Apple Inc. | 2019 | proprietary license |
| IOS 14 | Apple Inc. | 2020 | — |
| IOS 15 | Apple Inc. | — | — |
| IOS 4 | Apple Inc. | 2010 | Apple Public Source License |
| IOS 6 | Apple Inc. | 2012 | Apple Public Source License |
| IOS 7 | Apple Inc. | 2013 | Apple Public Source License |
| IOS 8 | Apple Inc. | 2014 | Apple Public Source License |
| IOS 9 | Apple Inc. | 2015 | end-user license agreement |
| IPadOS | Apple Inc. | 2019 | proprietary license |
| IPadOS 14 | Apple Inc. | — | — |
| IPadOS 15 | Apple Inc. | — | — |
| IPhone Linux | — | 2008 | — |
| JesusFreke ROM | — | — | GNU General Public License, version 2.0 |
| KaiOS | KaiOS Technologies, Inc. | — | GNU General Public License, version 2.0 |
| LightOS | The light phone inc. | — | — |
| LineageOS | — | 2016 | GNU General Public License, version 2.0, Apache License |
| LineageOS for microG | — | — | — |
| LuneOS | — | — | Apache License |
| Maemo | Nokia | — | — |
| Maemo Leste | — | — | — |
| Magic Cap | General Magic | 1994 | — |
| Magic UI | Honor | — | — |
| MagicOS | Honor | 2016 | proprietary license |
| MagicOS 10 | Honor | — | — |
| MagicOS 9 | Honor | — | — |
| MeeGo | Linux Foundation, Intel, Novell, Nokia, AMD | — | GNU General Public License, version 2.0 or later |
| MIUI | Xiaomi | — | GNU General Public License, version 3.0, Apache Software License 2.0 |
| MoKee ROM | — | 2012 | MIT License, GNU General Public License, version 2.0 |
| Nokia Asha platform | Nokia, Microsoft Mobile | — | — |
| Nura | — | — | GNU General Public License, version 3.0 |
| OctOS | — | — | — |
| OmniROM | — | 2013 | Apache License |
| Openmoko Linux | Openmoko | — | GNU General Public License |
| PAC-ROM | — | 2012 | — |
| Palm OS | Palm, Inc., Access | — | proprietary license |
| Paranoid Android | — | 2012 | — |
| PixelExperience | — | 2019 | — |
| Plasma Mobile | KDE | — | GNU Lesser General Public License, version 2.1, GNU General Public License, version 2.0, GNU Library General Public License, version 2.0 |
| PrivatOS | Silent Circle | 2014 | — |