krita.org/en/
Krita is a professional free and open source painting program. It is made by artists that want to see affordable art tools for everyone. It can be used for concept art, texture and matte paintings, illustrations and comics.
Explore games that last a few minutes made with Krita from the last day on itch.io · Upload your games that last a few minutes made with Krita from the last day to itch.io to have them show up here.