The code of this website is licensed under GNU General Public License 3.0 (source code accessible here), and the content within it is licensed under Creative Commons Attribution-ShareAlike 4.0 International , with attribution to the relevant authors as specified in their author pages. If no author is specified for something on this site, it may be assumed that it is authored by ourselves, and should be attributed to the name "fractal".
While this is not a legal requirement, if you do make a derivative work, we'd love to be informed of it! We love hearing about ways our work has helped others, and derivative works are some of the most obvious examples of that, so if you do make something, it would be nice to shoot us a twitter DM! It's not at all legally required, only the attribution is, but we'd still love to hear about it!
The favicon of this site is licensed from Denali National Park and Preserve under a Creative Commons Attribution 2.0 Generic license. The very heavy modifications applied to it to stylize it for use as a favicon are entirely our own, and may be freely used with credit to the original creators.