License is vague:
MINCE (version 2.5, 2.6, and 2.63), DIFF (version 1.1), Scribble (version 1.3), Pencil (version 1.3), and Crayon (version 1.3), along with any associated documentation (the "Materials"), are Copyright © 1980—1985 by Mark of the Unicorn, Inc.

These Materials are provided in accordance with Title 17 U.S.C. Section 107, and distributed without profit, in original and unmodified form, for non-commercial research and educational purposes, for use by those who have expressed a prior general interest in receiving the Materials.

The Portable MINCE authors claim no affiliation, endorsement, or sponsorship whatsoever by the originators of the Materials.

If you wish to use these copyrighted Materials for any purposes beyond "fair use", you MUST locate and obtain permission from the current copyright owner.

Another blog using org-mode. Recommends https://ambrevar.xyz/blog-architecture/index.html but that produces a 404 error as of 2023-05-12.

QMK (Quantum Mechanical Keyboard) is an open source community centered around developing computer input devices. The community encompasses all sorts of input devices, such as keyboards, mice, and MIDI devices. A core group of collaborators maintains QMK Firmware, QMK Configurator, QMK Toolbox, qmk.fm, and this documentation with the help of community members like you.
See also https://github.com/mihaiolteanu/mugur, an Emacs program to help configuring a QMK keyboard.

The site uses weblorg.
Other articles such as
https://muto.ca/posts/clean-password-management.html
https://muto.ca/posts/painting-in-guile-with-opengl.html
are interesting too.

Nyxt is a keyboard-oriented, infinitely extensible web browser designed for power users. Conceptually inspired by Emacs and Vim, it has familiar key-bindings (Emacs, vi, CUA), and is fully configurable in Lisp.
Was called Next before 2020-06-23 https://github.com/nEXT-Browser/nEXT

Successor of Dave Love's http://www.loveshack.ukfsn.org/emacs/multi-mode.el, found via
https://github.com/jingtaozf/literate-lisp

Work in progress.

GNU Emacs / N Λ N O is a set of configuration files for GNU Emacs such as to provide a nice and consistent look and feel as shown below. It is based on design principles I described in the article "On the design of text Editors" [1] that is available on arXiv. The light theme is based on Material colors [2] and the dark theme is based on Nord colors [3].

The philosophy of nano emacs is to stick as much as possible to vanilla emacs without introducing too much dependencies (or none if possible) and to keep it modular enough. The idea is for users to copy the part they are interested in such as to include them in their own configuration.

[1] https://arxiv.org/abs/2008.06030
[2] https://material.io/
[3] https://www.nordtheme.com/

https://github.com/larsbrinkhoff/its-presentation -
https://github.com/larsbrinkhoff/oscilliscious Vector graphics audio oscilloscope library.
https://github.com/larsbrinkhoff/emacs-history