Links

A curated shelf, clustered by interest and alphabetical within each cluster — a few good doors into each room rather than everything I've ever read. (Distinct from the Linux User Net weekly list, which is what got read on the air.)

Amateur radio — Pacific Northwest

• ARRG — the Amateur Radio Relay Group, whose K7RPT repeater system carries the Linux User Net
• Cascadia Mesh — the Pacific Northwest's mesh networking community, running on MeshCore rather than Meshtastic, the other LoRa mesh system
• Multnomah County ARES — the Amateur Radio Emergency Service field organization for Multnomah County
• Portland NET radio — the amateur radio path for Portland's Neighborhood Emergency Team volunteers, run by the city's Bureau of Emergency Management
• Willamette Valley Mesh Network — high-speed emergency data over an amateur radio mesh network (AREDN)

Software radio and digital voice

• FreeDV RADE — open-source digital voice for HF, rebuilt around machine learning
• rtl_433 — decodes weather stations, utility meters, and other ISM-band chatter with a cheap RTL-SDR dongle
• SDRconnect — SDRplay's cross-platform client for their RSP receivers, local or remote
• SDRoxide — a universal SDR transceiver written in Rust, with text-to-speech for blind operators built in

Linux

• ArchWiki — the best system documentation in the Linux world, whatever distribution you actually run
• The Linux Kernel Archives — the source, in both senses
• Linuxiac — Linux news, reviews, and distribution coverage
• LWN.net — the paper of record for Linux and free software development
• LXer — Linux news gathered from across the web, running longer than most of the distributions it covers
• Phoronix — Linux hardware, benchmarks, and development news, daily and relentless

Microcontrollers and electronics

• Adafruit Learn — the gentlest on-ramp to embedded hardware that actually works
• Falstad CircuitJS — an interactive circuit simulator in the browser; watch the electrons think
• Hackaday — daily builds, teardowns, and the occasional masterpiece

Signals and sound

• Julius O. Smith's online books — filters, spectral audio, and physical modeling, free from CCRMA
• The Scientist and Engineer's Guide to DSP — the classic free digital-signal-processing text; waveform analysis from first principles
• SuperCollider — a language for sound synthesis and algorithmic composition

Accessibility and standards

• BRLTTY — refreshable braille displays on the Linux console
• DAISY Consortium — the international standards body for accessible publishing and reading, from talking books to accessible EPUB
• Emacspeak — the complete audio desktop: Emacs that speaks, going strong for three decades
• eSpeak NG — the compact open-source speech synthesizer that can talk on almost anything
• Liblouis — the open braille translation library working inside most software that produces braille
• Orca — the screen reader for the Linux desktop
• RFC Editor — where the internet writes down how it works
• W3C Web Accessibility Initiative — the standards themselves, and the reasoning behind them
• WebAIM — practical accessibility techniques and the annual screen-reader survey

Statistics, data, and public health

• CRAN Task View: Epidemiology — a curated map of R's epidemiology packages
• The Epidemiologist R Handbook — free, field-tested R for outbreak response and public-health practice
• OpenIntro Statistics — free, rigorous textbooks for real statistical thinking
• Our World in Data — public health and global development, charted and sourced
• Python for Data Analysis — the pandas book, open edition, from the library's own author
• The R Project — the lingua franca of statistical computing
• Seeing Theory — probability and statistics, made visual and interactive
• Tidyverse — the R dialect most modern data work speaks

Computer science and electrical engineering

• All About Circuits — free textbook series from DC fundamentals through semiconductors
• Nand2Tetris — build a computer from NAND gates up; the single best bridge between EE and CS
• Teach Yourself CS — the self-study curriculum, honestly prioritized

YouTube channels

• Adrian's Digital Basement — board-level repair of vintage computers, one probe at a time
• Asianometry — video essays on the semiconductor industry and the economics of technology
• Cathode Ray Dude — gloriously deep dives into weird video gear and orphaned formats
• Dave Casler — patient answers to the questions every radio operator eventually asks
• Jeff Geerling — Raspberry Pi, homelabs, and rigorous hardware testing, with the source code to match
• Louis Rossmann — board-level repair and the fight for the right to repair what you own
• Save It For Parts — salvaged satellite dishes and thrift-store radio gear, talking to spacecraft on a budget
• Tech Tangents — restoring and documenting the computing hardware history almost forgot
• Techmoan — vintage audio and the consumer formats that time left behind
• Temporarily Offline — amateur radio without the stuffiness: gear, experiments, straight talk
• Usagi Electric — bringing vacuum-tube and minicomputer-era machines back to life, rack by rack