Triggerhappy is a hotkey daemon that operates on a system wide scale. It watches all configured input devices for key, switch or button events and can launch arbitrary commands specified by the administrator. In contrast to hotkey services provided by desktop environments, Triggerhappy is especially suited to hardware related switches like volume or wifi control; it works independently from a specific user being logged in and is also suitable for embedded systems that do not a graphical user interface.
The source can be found on https://github.com/wertarbyte/triggerhappy

Found via Scheme Planet, where he announced his SRFI to support everything needed for the exercises in SICP.

Solarized colorschemes for org-mode HTML exports. It is supposed to be used as a single stylesheet for HTML documents that uses regular HTML elements.

Squares RNG is a counter-based version of Middle Square Weyl Sequence RNG.  Counter-based RNGs have no state and are well suited to parallel processing.  There is no need to maintain or initialize a state.  Squares is faster than Middle Square Weyl Sequence on an Intel Core i7-9700.  Processing speed is, of course, processor dependent and may vary on other processors.  If you are currently using Middle Square Weyl Sequence, you might consider Squares.  It produces data of equivalent quality and is easier to use since there is no state.

This generator passes BigCrush and PractRand.

Pikchr (pronounced "picture") is a PIC-like markup language for diagrams in technical documentation. Pikchr is designed to be embedded in fenced code blocks of Markdown or similar mechanisms of other documentation markup languages.
Pikchr source code is released under a zero-clause BSD license.

A full and efficient ISO/IEC 13816:2007(E) ISLISP Implementation.
Commercial software, can be used for free for non-commercial use.
An emacs-like editor for DOS and Windows by the same author can be found on
http://christian.jullien.free.fr/emacs/

Found via a link to https://tonsky.me/blog/disenchantment/
on Brett Gilio's article
https://brettgilio.com/posts/2020-07-27-intro-and-computing.html#fn.2

Nikita's article about git is interesting, though a bit old. Note that Fossil implements a web- based GUI.

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

Blog article describing an rsync-based backup system, with reasons why it was chosen over restic.

See also
https://www.keyboardco.com/
https://www.realforce.co.jp/en/
butI have yet to find one with Control where the standard keyboard has CapsLock.