For historical reasons the license of the website content isn't very clear. The content under web/wiki was initially maintained in a Sourceforge wiki, then in a GitHub wiki and then it was imported into this repo, and doesn't have a license.

Any content added after 2023-03-03 is licensed under the following terms:

The website content is licensed under CC-BY-SA-4.0
All code samples are licensed under CC0-1.0
Everything else, like code/configuration/templates/stylesheets and similar, that are used for building and maintaining the website is licensed under BSD-3-Clause

The same is true for all content by the following authors independent of when it was added:

Christoph Reiter (https://github.com/lazka)
David Macek (https://github.com/elieux)

This of course does not apply to any content that is explicitly licensed under different licenses.

Files/content included from other sources:

overrides/fonts/*: auto generated from npm packages, see fonts/package.json for details
web/ray.jpg: taken from https://www.gofundme.com/f/help-Ray-fund-a-hospice-bedroom
web/donate/github*.png: taken from https://github.com/logos
web/donate/opencollective.png: taken from https://docs.opencollective.com/help/collectives/widgets
web/sponsors/jsdelivr*.svg: taken from https://github.com/jsdelivr/jsdelivr-media
web/codeofconduct.md: taken from https://www.contributor-covenant.org/version/2/0/code_of_conduct

See the respective sources for license information.