"Linux trust" and "Linux trust v2" use a paint from: https://www.parismuseescollections.paris.fr/fr/musee-carnavalet/oeuvres/le-depart-du-dragon (licence: https://creativecommons.org/publicdomain/zero/1.0/)

"Linux power" and "Linux illuminated" migrate from: https://www.pling.com/p/1953841/
They were inspired by these works: https://www.pling.com/p/1387375 and https://www.pling.com/p/1042356/

"Linux explorers" is a mix.