Below is a list of Creative Common licenses that sometimes are used for the images throughout this site:
- https://creativecommons.org/licenses/by/2.0/
- https://creativecommons.org/licenses/by-nd/2.0/
- https://creativecommons.org/licenses/by-nc/2.0/
- https://creativecommons.org/licenses/by-nc-nd/2.0/
- https://creativecommons.org/licenses/by-nc-sa/2.0/
- https://creativecommons.org/licenses/by-sa/2.0/
- https://creativecommons.org/publicdomain/zero/1.0/