Lots of links to interesting projects.
https://www.reddit.com/r/Common_Lisp/comments/thspgt/securing_quicklisp_through_mitmproxy/
https://github.com/clasp-developers/clasp/releases/tag/2.0.0

SC4 is a secure communications system specifically designed for (relatively) easy auditability by way of a ruthless commitment to simplicity. SC4 provides the functional equivalent of PGP from the end-user's point of view, but implements it in two order of magnitude less code. The cryptographic core of SC4 is Daniel J. Bernstein's TweetNaCl library (<800 LOC). On top of this we have a variety of UI implementations ranging from 1000 to 5000 LOC. One of these has completed a formal audit to date.

Information about m-sequences and Gold codes. The condition l ≠  0 (mod 4) is missing.
The site has a lot of information about wireless communciation, e.g. http://www.wirelesscommunication.nl/reference/xtra/story.htm

Fe[nl]ix explains his approach to maintain a version number for Lisp systems.

Explanation of GNU epsilon https://www.gnu.org/software/epsilon/epsilon.html
"The ε core language, an imperative first-order language, is called ε₀. It’s inconvenient for humans to use for serious problems, yet simple and potentially very efficient. Using ε₀ I’ve built ε₁, a higher-level language with a Lispy feel, but untyped — not dynamically typed like Lisp: untyped, like Forth and machine language."

See also https://ageinghacker.net/blog/posts/33/ for make-gallery, a bash script to generate a HTML photo gallery.

The https://www.espruino.com/Bangle.js2  is an inexpensive smartwatch with an ARM processor, 256K of RAM, 9MB of flash memory, a touch screen, GPS, a vibration motor, and a heart rate monitor and other sensors. Apps are written in JavaScript. The watch uses a special version of the Gadgetbridge Android app, which can forward notifications from selected phone apps to the watch over Bluetooth. Watch apps can retrieve data from web sites using Gadgetbridge.
See also https://speechcode.com/maps/world?places=ad,at,be,ca,ch,cn,cz,de,dk,ee,eg,es,fi,fr,gb,gr,hr,hu,id,ie,il,it,jo,jp,li,lt,lv,mt,nl,no,pt,se,si,sk,tr,us for a "Push-pin" Map of the world.

See https://spec.commonmark.org/ for the specification, http://code.commonmark.org/ for a reference implementation and validation test suite on GitHub.

Oil is a new Unix shell. It runs your existing shell scripts, and it's a new language for Python and JavaScript users who avoid shell!
Found on https://swalla24.people.uic.edu/about/

full-featured tiling X window manager for Emacs built on top of XELB. It features:

Fully keyboard-driven operations
Hybrid layout modes (tiling & stacking)
Dynamic workspace support
ICCCM/EWMH compliance
(Optional) RandR (multi-monitor) support
(Optional) Builtin system tray
(Optional) Builtin input method
Found on https://news.ycombinator.com/item?id=22457846, where I read the intriguing comment "I have been using it exclusively on my machines for the past three years. By far the best computing environment I have used." from Vladimir Sedach.