some interesting things from other people that I read in the sub-thread:
1. We should care about Free Typography:
* I dicovered 'GNU Free Fonts' here https://www.gnu.org/software/freefont/
2. Licensing can be tricky: Different ethical rules apply to non-functional
works. (rms distributes all its articles/talks under the CC BY-ND, which is
"non-free" if applied to functional works such as software and
documentation).
Most themes (and other materials) are under licenses that let the user
non-commercially redistribute the theme. The FSF would be OK.
Please, I would like to know which are all they, to choose without fear
materials that respect Free Software philosophy.
Thanks.