A useful early warning signal computing library which can detect, calculate and notify you of bifurcations in time series.

A rust implementation of age (https://links.martyoeh.me/shaare/AXXx7g)

Frontend for papis, allowing you to search, sort, browse through your references.
Has some advanced features for copying stuff to clipboard, sending things to vim, and is configurable with its mappings (which somewhat mimic vim to begin with).

Early development still (no support for whoosh database e.g.) but very promising!

tries to have small explicit keys, no config options, and UNIX-style composability.

A gpg alternative that feels more modern, allows for less customization (which is generally a good thing in encryption) and has a very simple interface.

In essence it tries to be everything that gpg is not - except for also being secure. Unfortunately, adoption and integration is nowhere near the level of gpg (e.g. e-mail encryption, keyservers, general adoption with public key profiles reachable over web, etc)

A fun overview of web development using spellbook metaphors

Burgeoning linter for zsh scripts. Akin to shellcheck but specific to zsh. Developed by a trustworthy individual, so even if early days is probably fruitful to keep an eye on.