On Thu, Apr 8, 2021 at 7:10 PM Stefan Kangas <stefan@marxist.se> wrote:

True.  all-the-icons.el has some links to other freely licensed sets.
Could one of them be a suitable replacement?

All-the-icons uses fonts to "bundle" the icons, which I recall some people dislike, but we could extract them. Here's a link to the details of those fonts: 
  https://github.com/domtronn/all-the-icons.el#resource-fonts
 
That takes you to Github, so here's the relevant data. (I tried to use the eww render, but it lost the links.)

All of the fonts provided in this packages as resources come with either the SIL Open Font License (OFL) or an MIT License, below I will link to each of the fonts Sources and their Licenses.

Font NameFontLicense
file-icons.ttfAtom File Icons PluginMIT LICENSE
fontawesome.ttfFontAwesome IconsSIL OFL LICENSE
ocitcons.ttfGitHub OctIconsSIL OFL LICENSE
weathericons.ttfWeather IconsSIL OFL LICENSE
material-design-icons.ttfMaterial IconsAPACHE LICENSE v2.0
all-the-icons.ttfCustom Made FontMIT LICENSE

Hope that helps,
~Chad