Sounds interesting.

5. Mai 2025, from Hannes

BorgBackup (short: Borg) is a deduplicating backup program. Optionally, it supports compression and authenticated encryption.

The main goal of Borg is to provide an efficient and secure way to backup data. The data deduplication technique used makes Borg suitable for daily backups since only changes are stored. The authenticated encryption technique makes it suitable for backups to not fully trusted targets.

On-line tool to show the representation of floating point numbers. Found on Philp Kaluđerčić's page https://wwwcip.cs.fau.de/~oj14ozun/links.html

Explanation and JavaScript code to translate secret OTP keys from Google Authenticator to a format useful for Yubikey.
https://alexbakker.me/post/parsing-google-auth-export-qr-code.html has some details about the format. Alex Bakker has written https://github.com/beemdevelopment/Aegis, an {T,H}OTP authenticator app for Android.

"Keepass2Android (K2A) is an open souse [sic] port of the excellent KeePass password manager for Windows to the Android platform."
I just read on https://github.com/android-password-store/Android-Password-Store/discussions/3260 that the password store application has been archived, i.e. development has stopped.

Found via Jamie Zawinsky's blog https://www.jwz.org/blog/2025/07/you-should-be-using-rss/

Another website (blog and wiki) using org-publish
Found via the Emacs Wiki https://www.emacswiki.org/emacs/lepisma
See also https://lepisma.xyz/wiki/emacs/org-mode/references.html for working with references in org-mode.
Other examples are https://lepisma.xyz/wiki/readings/impactful.html

LionsOS is an operating system based on the seL4 microkernel with the goal of making the achievements of seL4 accessible. That is, to provide performance, security, and reliability.

LionsOS is being developed by the Trustworthy Systems research group at UNSW Sydney in Australia.

Found via the link on https://www.crystallabs.io/unix-books-papers-videos

Web interface to free42, an simulator of the hp42 RPN calculator. Announced on https://www.hpmuseum.org/forum/thread-23784-post-206688.html#pid206688, it can be tried on https://files.connorcode.com/Sites/free42-web/index.html

This tool uses python's calendar library (which provides modular ncal functionality) to generate a TeX based, A4-sized wall calendar with one month per page.
See also https://github.com/DavidGriffith/panda-display for a version of Spare Time Gizmos' Panda display for pdp-10 simulators with USB interface, which I first saw on Lars Brinkoff's video https://m.youtube.com/watch?v=q11mOtTs2Zo

Graphical timeline of Plan 9 and related operating systems.
Announced on the 9fans mailing list https://marc.info/?l=9fans&m=175278059902135&w=2
Source code can be found on https://github.com/sirjofri/Plan9History

1. März 2023, 10:56 Uhr

Sounds like an interesting idea.

Found via Sacha Chua's blog https://sachachua.com/blog/2025/07/2025-07-07-emacs-news/
Has many interesting articles about Emacs and other tools for programming. e.g.
http://yummymelon.com/devnull/introducing-regfmt.html  describes a tool to produce diagrams showing the layout of registers

Orgdown (in short “OD) is a lightweight markup language similar tocMarkdown but it’s consistent, easy to learn, simple to type evencwithout tool-support, and it is based on its older brother: Org-mode
The purpose of this site is to provide basic information on the Orgdown syntax, supported software programs, mobile apps, services, and parsers.

TODO: Star it on GitLab

Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations.

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 via the SQLite FAQ https://sqlite.org/faq.html#q25 which links to https://wiki.tcl-lang.org/page/Generating+Syntax+Diagrams+Using+Tk

Found via Liam Proven's page https://www.theregister.com/2025/04/14/the_lgp30_retrospective/

Line-drawing using Unicode characters. Some of the drawings are impressive, but many have small artifacts like slightly misaligned arrows.
Found on Sacha Chua's blog https://sachachua.com/blog/2025/06/2025-06-09-emacs-news/

Found via https://matheplanet.at/matheplanet/nuke/html/viewtopic.php?topic=266736&post_id=1945117

Found on Joseph Holsten's blog https://blog.josephholsten.com/2012/05/03/smalltalk-in-smalltalk-in-javascript/
The git repository https://lolg.it/amber/amber has been updated 3 years ago (2022).

Found via the link https://leon_plickat.srht.site/writing/custom-emacs-qalc-repl-popup/article.html on Sacha Chua's blog https://sachachua.com/blog/2025/06/2025-06-02-emacs-news/
https://leon_plickat.srht.site/writing/painless-mail-imaps-smtp-gnus-emacs/article.html sounds interesting.

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

It is from 2012, but I really like the phrase "Tab Purgatory"
"It has also replaced bookmarks and for me, and in some cases, has allowed me to free things from Tab Purgatory (where a tab is indefinitely open, always to be read 'later')."
Found via the 9fans mailing list https://www.tuhs.org/pipermail/tuhs/2025-May/031878.html

Found on Sacha Chua's blog https://sachachua.com/blog/2025/05/2025-05-12-emacs-news/ via https://osem.seagl.org/conferences/seagl2019/program/proposals/664,
https://osem.seagl.org/users/365 and
https://osem.seagl.org/conferences/seagl2023/program/proposals/952

An idea to simplify the software layers involved between command line and display.
Found on the 9fans mailing list https://9fans.topicbox.com/groups/9fans/T4f1a2098b1e1c854-M474a043f6f18ee4e660a427b/next-generation-acme
See https://github.com/letoram/arcan/wiki for a wiki about Arcan. https://www.divergent-desktop.org/blog/2020/08/10/principles-overview/ seems to be a good start.

he Free Software Foundation (FSF) today announced the JShelter project, an anti-malware Web browser extension to mitigate potential threats from JavaScript, including fingerprinting, tracking, and data collection.
The project's website is at https://jshelter.org/.

Found on CLiki https://www.cliki.net/42links

Interesting book by Paul C. van Oorschot, recommended by Rik Farrow on the TUHS mailing list https://www.tuhs.org/pipermail/tuhs/2025-May/031832.html

Found on Sacha Chua's blog https://sachachua.com/blog/2025/04/2025-04-21-emacs-news/

Found on the irreal blog https://irreal.org/blog/?p=12928

Great quote: "LLMs are plagiarism machines that use all of the world’s energy".  Found via Sacha Chua's blog https://sachachua.com/blog/2025/04/2025-04-21-emacs-news/

Found on the MoHP forum

Found via the Larceny benchmarks https://larcenists.org/benchmarks2017.html

Found via Sacha Chua's blog https://lmno.lol/alvaro/journelly-vs-emacs-why-not-both

Found via the Raspberry π article https://www.raspberrypi.com/news/raspberry-pi-45w-usb-c-power-supply-on-sale-now-at-15/

Forum about retrocomputing, found via a link on Norbert Landsteiner's site https://masswerk.at/lounge.php
https://retrocomputingforum.com/t/some-materials-on-early-c-and-the-history-of-c/3016 looks interesting.

Blog about emulators of Lisp machines. Found via a link on the computer history wiki https://gunkies.org/wiki/LISP_machine

Shell scripts from Rob Pike to show operator precedence in C and Go.

Start of a thread on the TUHS mailing list mentioning the japanese project https://github.com/ryomuk/TangNanoDCJ11MEM/tree/main
Memory system and UART implemented on Tang Nano 20K FPGA for DEC DCJ11 PDP-11 Processor.

"Both engineers and computational scientists alike will benefit greatly from having a standard test set for Initial Value Problems (IVPs) which includes documentation of the test problems, experimental results from a number of proven solvers, and Fortran subroutines providing a common interface to the defining problem functions. Engineers will be able to see at a glance which methods will be most effective for their class of problems. Researchers will be able to compare their new methods with the results of existing ones without incurring additional programming workload; they will have a reference with which their colleagues are familiar. This test set tries to fulfill these demands and tries to set a standard for IVP solver testing."
Found on John Butcher's page https://www.jcbutcher.com/rkclub

"KM3NeT is a research infrastructure housing the next generation neutrino telescopes. Once completed, the telescopes will have detector volumes between megaton and several cubic kilometres of clear sea water. Located in the deepest seas of the Mediterranean, KM3NeT will open a new window on our Universe, but also contribute to the research of the properties of the elusive neutrino particles. With the ARCA telescope, KM3NeT scientists will search for neutrinos from distant astrophysical sources such as supernovae, gamma ray bursters or colliding stars. The ORCA telescope is the instrument for KM3NeT scientists studying neutrino properties exploiting neutrinos generated in the Earth's atmosphere. Arrays of thousands of optical sensors will detect the faint light in the deep sea from charged particles originating from collisions of the neutrinos and the Earth. The facility will also house instrumentation for Earth and Sea sciences for long-term and on-line monitoring of the deep sea environment and the sea bottom at depth of several kilometers."
See https://www.km3net.org/km3net-detects-the-highest-energy-neutrino-ever-observed/ for a recent observation.
Found via https://xkcd.com/3053

A source for the statement "The actual number of gates needed to factor a
n-bit number is 72 * n^3; so for 15, it's 4 bits, 4608 gates; not happening any
time soon." would be nice.

Links to some editors inspired by plan 9's acme.