Re: What?

These two are also very well-known, but only work with zsh:
- https://github.com/ohmyzsh/ohmyzsh  (much wider scope than prompt, but
  customizing it is one the most visible features)
- https://github.com/sindresorhus/pure

Just for the reference and to be more complete, I will add this one to the list:
https://github.com/spaceship-prompt/spaceship-prompt

also quite well known and which inspired Starship which was initially a rewrite in
a compiled langage to make execution much faster.

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DW