I discovered this blog via the link to http://johnj.com/posts/to-the-metal/ on https://planet.lisp.org/
His static site generators https://github.com/eigenhombre/weeds and https://github.com/eigenhombre/organa look interesting too.

jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.

LDAP stands for Lightweight Directory Access Protocol. The lightweight part comes from the fact it does not implement ALL of the standard. X.500 is quite unwieldy, and much of it has been superseded (e.g. the OSI networking stack) or considered impractical (e.g. such as canonical per entry Distinguished Names) or undesirable (e.g. publishing directories of private entities like businesses).
Found via a link on ... to https://wiki.gentoo.org/wiki/Project:Prefix

Common Lisp program trying to map between Unix and Lisp concepts.

Measurements with internal and external reference clock.

This theme was mentioned on https://www.reddit.com/r/emacs/comments/1czgb5f/acmetheme_is_just_so_pleasant_to_look_at/ which I found on Sacha Chua's blog https://sachachua.com/blog/2024/05/2024-05-27-emacs-news/
https://github.com/ianyepan/acme-emacs-theme

The references look interesting.

BBOS provides a command line interface (or CLI) that lets you interface with the RP2040 board directly. This makes it possible to not only interact with the Pi but also handle practical functions like real-time debugging. https://github.com/mcknly/breadboard-os

unsurv offline is a privacy friendly, small and lightweight PCB (45 mm x 32 mm) based on an ESP32 featuring a high quality GNSS receiver, accelerometer, and NFC capabilities. Using a combination of onboard features and OpenStreetMap (OSM) data, unsurv offline helps you collect and analyze location data in a privacy-friendly way. Originally conceived to better understand offline video surveillance, this fully open source project is here to help you find and develop a variety of custom use cases.

Project using the camera of Android or iOS phones to detect cosmic rays.