Found https://partofthething.com/thoughts/?p=835 via https://hackaday.com/2015/12/12/raspberry-pi-communication-via-laser/
Reducing dependency on Google is a good idea.
https://partofthething.com/thoughts/the-infopanel-a-simple-mqtt-connected-display-system-for-weather-traffic-pictures-animations-anything/
https://partofthething.com/thoughts/making-a-cheap-and-simple-barn-door-star-tracker-with-software-tangent-correction-for-astrophotography/
https://partofthething.com/thoughts/reading-out-a-crookes-radiometer-light-mill-with-python-and-opencv/
https://partofthething.com/thoughts/the-modern-era-passed-through-a-cathode-ray-tube/
and
https://partofthething.com/thoughts/adding-rigor-to-information-analysis-in-the-era-of-fake-news-and-alternative-facts/
sound interesting too.

The SmartPi expansion module extends the Raspberry Pi by interfaces for voltage measurement and non-contact current measurement and thusbecomes a fully-fledged SmartMeter that controls and records powerconsumption and power generation and makes it available in the network or the Internet.

Interesting review of the Raspberry π 2 W, found via a link on Jamie Zawinsky's blog
https://www.jwz.org/blog/2018/12/advanced-linux-sound-architecture/#comment-195132
See also the https://ownyourbits.com/2019/02/02/whats-wrong-with-the-raspberry-pi/

Hat for Raspberry Pi with a number of sensors:
BME280 temperature, pressure, humidity sensor
LTR-559 light and proximity sensor
MICS6814 analog gas sensor
ADS1015 analog to digital converter (ADC)
MEMS microphone (datasheet)
0.96" colour LCD (160x80)
Connector for particulate matter (PM) sensor (available separately, see https://shop.pimoroni.com/products/pms5003-particulate-matter-sensor-with-cable?variant=29075640352851 )

Found via https://www.hpmuseum.org/forum/thread-17957-post-156688.html#pid156688

Found on Leah Neukirchen's blog https://leahneukirchen.org/trivium/2021-09-19

Builds and other info for FiveNinjas Slice (CM1) and Slice2 (CM3) devices.
See https://forum.libreelec.tv/thread/8845-slice-fiveninjas-original-forum-dead/?postID=53810#post53810 for an announcement of a repackaging of LibreELEC.

The Amsterdam Compiler Kit is a cross-platform compiler and toolchain suite that is small, portable, extremely fast, and extremely flexible. It targets a number of low-end machines including the Z80, 8086 and 80386, but there are many other code generators available. It supports several languages, including ANSI C, Pascal and Modula-2, and contains integrated runtime libraries including a libc.

The maintainer, David Given states "I, dtrg, cannot honestly recommend using the ACK for production code unless as a stop-gap measure or unless the other benefits of the ACK (e.g. having a very lightweight turnkey toolchain is valuable to you) outweigh the code quality."

For a long time, we were unhappy with having to care about security issues and Linux distribution maintenance on our various Raspberry Pis.
Then, we had a crazy idea: what if we got rid of memory-unsafe languages and all software we don’t strictly need?
Turns out this is feasible. gokrazy is the result.

Main page is http://cowlark.com/cowgol/
It used to support the Apollo Guidance Computer used in the Apollo spacecraft, but I had to remove the code generator while rewriting the compiler and I haven’t reworked the AGC backend.
http://cowlark.com/2019-07-20-cowgol-agc/index.html
The author also ported the Fuzix operating system to the Raspberry π pico.
http://cowlark.com/2021-02-16-fuzix-pi-pico/index.html

His tool https://github.com/davidgiven/narcissus to remap keys might be interesting too.
So is his Forth system http://cowlark.com/fforth/