built-with-resentment.svg and contains-technical-debt.svg were originally sourced from https://forthebadge.com/, with the repository located at https://github.com/BraveUX/for-the-badge. made-in-byond.gif is a user-generated modification of one of these badges provided by this service.
Both comics are sourced from https://www.monkeyuser.com/, which gives permission for use in non-profit usage via https://www.monkeyuser.com/about/index.html. bug_free.png can be found at https://www.monkeyuser.com/2019/bug-free/, and the original version of technical_debt.png can be found at https://www.monkeyuser.com/2018/tech-debt/ (the version found in the folder has been modified).