Written by Rob Pike,  "It is a plaything and a work in progress."
Found via the MoHP forum https://www.hpmuseum.org/forum/thread-23748-post-206165.html#pid206165

Found on Drew DeVault's blog https://drewdevault.com/2024/05/24/2024-05-24-Bunnix.html

Documentation for the S7 scheme interpreter, which can be found on https://ccrma.stanford.edu/software/snd/snd/s7.html

Found via the message https://www.tuhs.org/pipermail/tuhs/2025-March/031472.html on the TUHS mailing list.
See https://vlang.io/ for the V programming language. Some other new programming languages are mentioned on
https://www.tuhs.org/pipermail/tuhs/2025-March/031487.html

Found on Sacha Chua's blog https://sachachua.com/blog/2025/02/lispy-gopher-show-2025-02-05-programming-languages-history-blogging-and-communities-with-screwtape-ramin-honary-and-me/

Interesting article about Richard Gabriel's "Worse is better". Found via a link to https://yosefk.com/blog/my-history-with-forth-stack-machines.html on Felix Winkelmann's site http://call-with-current-continuation.org/misc.html

Sail is a language for defining the instruction-set architecture (ISA) semantics of processors: the architectural specification of the behaviour of machine instructions. Sail is an engineer-friendly language, much like earlier vendor pseudocode, but more precisely defined and with tooling to support a wide range of use-cases.
Found on the CHERI page https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/

"Chialisp is a pure and functional language with a focus on security and auditability. Chialisp is commonly used on the Chia blockchain to lock funds in smart coins until spent and released by their owner. This enables behavior similar to that of smart contracts."
Mention on the Lisp timeline at https://en.wikipedia.org/wiki/AutoLISP

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.

An example from Peter Seibel's blog, see also
https://gigamonkeys.com/code-reading/
https://gigamonkeys.com/knuth-dijkstra/