assets/font.ttf (Noto Sans Mono Regular), assets/font-bold.ttf (Noto Sans Mono Bold): These are from the Noto font family, licensed under the Apache License, version 2.0, as found in apache2.txt. They can be found here: https://www.google.com/get/noto/ lib/stb_truetype.h: See https://github.com/nothings/stb