Mentioned on the Interlisp mailing list.

Campaign to encourage FOSS developers to use other services instead of GitHub.
Found on Plan 9 mailing list https://marc.info/?l=9fans&m=167213881800670&w=2, where
https://ghuntley.com/fracture/ and https://isdotnetopen.com/ were mentioned as well.

The MakerLisp Machine is a portable, modular computer system, designed to recapture the feel of classic computing, with modern hardware. The CPU is a Zilog eZ80 running at 50 MHz, which supports up to 16 MB of zero wait state RAM. The system software is 'MakerLisp', a 'Lisp on Bare Metal' system that allows direct access to system hardware, while providing the concise expressive power of a functionally complete Lisp environment. The machine is also an ideal platform for an extended CP/M. A full system configuration is pictured here, with CPU, expansion board, USB keyboard, and VGA display, in the laser-cut wood 'MakerStation' enclosure.
Found via the TUHS mailing list https://www.tuhs.org/pipermail/tuhs/2022-December/027035.html

Besides "VM and the VM Community: Past, Present, and Future", which I have started to read, it also has other documents, including "What Mother Never Told You About VM Service, 1983", which was mentioned in
https://www.tuhs.org/pipermail/tuhs/2022-December/026996.html
"What Mother Never Told You" is still the best document about system maintenance ever written.

Augeas is a configuration editing tool. It parses configuration files in their native formats and transforms them into a tree. Configuration changes are made by manipulating this tree and saving it back into native config files.
Found on https://gitlab.com/uxrt/uxrt-toplevel/-/blob/master/architecture_notes

Nice story, including bits about the history of serial interfaces going back to Samuel Morse.

Alternative firmware for ESP8266 with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at https://tasmota.github.io/docs
See also https://ota.tasmota.com/tasmota/release/

Found via the author's blog https://www.dl1ye.com/posts/2021-04-29-universal-lnb-biastee/ which in turn was found when searching for a bias tee.

I was looking for [dm-]verity, but this guide will be useful for other subjects.

Emacs-related articles on Nick Higham's blog.
See also the interesting "What Is" series of articles, mostly on numerical linear algebra.