@Gradually_Adjusting I started out using Nuclino as a combined wiki and project management tool, but the free plan became too small.
Now I use offline Markdown notes (Zettlr or Gedit), publishing to a personal “wiki” (Docusaurus). For rough drafts I use my ReMarkable.
However, I'm not much of a GM yet – I've done some worldbuilding but only run one one-shot so far. I'm preparing for a full campaign this year, so I'll make sure to check out Kanka and other recommendations in this discussion!
Can't answer for @BlubberSeal, but in my hand-waved sci-fi setting, I've gone with a two-part solution for pets.
Feral animals are genetically and socially far enough removed from anthros to be considered their own primitive species. They are treated like in our world.
Pets are inconvenient in a high-tech space future, so if anything, most people have robot pets designed as small feral animals. These double as ‘intelligent’ personal technological interfaces (think smartphones, but cool).