An AsteroidOS image is made of plenty of components and it’s hard to describe the full details of all the licenses that are in use in the system.
However, when building the system from sources with OpenEmbedded, one can find the exhaustive set of licenses used by each package in the build/tmp-glibc/deploy/licenses directory.
It’s also worth noticing that on most watches, a few proprietary blobs and firmware need to be used for GPU acceleration and Bluetooth. They are isolated components which can be found in the /vendor/ directory and they are used via libhybris.

The licenses directory of nightly builds is published online for you to check.
The licenses directory of the latest stable version is also available here

Global Overview

All the apps are distributed under GPLv3.
QML-Asteroid is distributed under LGPL-2.1.
asteroid-launcher is distributed under BSD.
The wallpapers are covered by the CC BY 2.0 and the logo by CC BY SA 2.0.

Font types

The following font types are used in and distributed with an AsteroidOS system image.

Font	License
Source Sans Pro - Bold, Source Sans Pro - Regular	The font "Source Sans Pro" is licensed under SIL Open Font License and was created by Paul D Hunt. license
Roboto Flex	The font "Roboto Flex" is licensed under SIL Open Font License and was created by Font Bureau, David Berlow, Santiago Orozco, Irene Vlachou, Ilya Ruderman, Yury Ostromentsky, Mikhail Strukov . license
Outfit	The font "Outfit" is licensed under SIL Open Font License and was created by Rodrigo Fuenzalida. license
Open Sans	The font "Open Sans Condensed" is licensed under Apache License version 2.0 and was created by Steve Matteson. license
Open Sans and Roboto	are licensed under the Apache License v2.0, you can find a copy of this license in the COPYING-Apachev2 file.
FatCow	is licensed under Creative Commons Attribution 3.0: http://www.1001fonts.com/fatcow-font.html you can find a copy of this license in the COPYING-CCBY3.0 file.
Twemoji	has two licenses, the code is licensed under MIT, you can find a copy of this license in the COPYING-MIT-Twemoji file. Graphics are licensed under CC-BY 4.0, you can find a copy of this license in the COPYING-CCBY4.0 file.
Sunflower	The font "Sunflower" is licensed under SIL Open Font License and was created by The Sunflower Project Authors. license
Montserrat	The font "Montserrat" is licensed under SIL Open Font License and was created by The Montserrat project. license
BebasKai, Bebas Neue	The fonts "BebasKai" and "Bebas Neue" are licensed under SIL Open Font License and was created by Dharma Type. license
Titillium-Bold, Titillium-Regular, Titillium-Thin	The font "Titillium" is licensed under SIL Open Font License and was created at the Accademia di Belle Arti di Urbino. license
Fyodor	The font "Fyodor" is licensed under SIL Open Font License and was created by Chris Hughes. license
Raleway	The font "Raleway" is licensed under SIL Open Font License and was created by Matt McInerney & Pablo Impallari. license
LeagueSpartan, Noto Sans, Symbola and Xolonium	are licensed under the SIL Open Font License v1.1. You can find a copy of this license in the COPYING-OFL file.
PT Sans	The font "PT Sans" is licensed under SIL Open Font License and was created by Designed by Alexandra Korolkova, Olga Umpeleva and Vladimir Yefimov and released by ParaType in 2009. license
Signika	The font "Signika" is licensed under SIL Open Font License and was created by Ancymonic. license
Outfit	The font "Outfit" is licensed under SIL Open Font License and was created by Rodrigo Fuenzalida. license