Found via https://www.emacswiki.org/emacs/Git which links to https://snarfed.org/emacs-vc-git-tweaks
The software page https://snarfed.org/software contains some interesting tools

Literate program containing configuration for shell, emacs and a number of other programs.

Aggregation of blogs about Emacs.

An Emacs theme inspired by Plan 9's Acme & Sam Editor.

Blog article about configuring and using the GNU privacy guard gpg, the password manager pass and Emacs, found via Sacha Chua's blog.

I just have browsed, but there are many interesting articles
https://jao.io/blog/2006-03-17-programmers-go-bananas.html category theory
https://jao.io/blog/2020-05-01-dancers-at-the-end-of-time.html sounds like an interesting book.
https://jao.io/blog/2006-07-06-geometrically-speaking.html geometric proofs, Kindergarten Quantum Mechanics
https://jao.io/blog/2020-05-04-observatory.html Mozilla Observatory to check a website's security

Simple example of getopts.
There are a number of interesting articles on https://notes.neeasade.net/, e.g.
https://notes.neeasade.net/mobile-capture-with-orgzly-termux-and-syncthing.html

Filestash (formerly nuage) is a web client for org-mode. It started as its author believe emacs and org-mode are the greatest thing since sliced bread. The project aims to fix the pain points org-mode's users may have:
- emacs isn't great out of the desktop world, it needs a cross platform companion app
- not everyone is willing to go through learning emacs which makes org-mode a hard to sell tool to manage team project.

Enjoy the various programming-themed writings availble on offer. The latest post is available below and the archive link is directly above this text.

This package is a keystroke visualizer for GUI version Emacs.
You no longer need to use external tools to display keystrokes when creating screencasts!