I donate to a few things (eff, fsf, Mozilla, kvaesitso, my Lemmy instance, tasks.org) but want to donate to more (guix, keepassdx, syncthing, eternity, maybe some others).

Never used nix but it’s goals are similar to guix. Worth checking out if you ever get extra hw.

Gnu Guix. By default Guix uses only free libre software, but there are ways to install it with a non-free kernal. Systemcrafters has a guide (this is what I used) as well as non-guix (guix repo for non free software).

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Racket: problem - > #lang solution

annas-archive.org/ often has ipfs links for books fyi.