Tech
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Prry
The IndieWeb digital garden of Lee Perry in Burnley, UK, with notes and longer articles on learning to code, getting fit…
Putting the You in CPU
A free illustrated mini-book explaining what actually happens inside a CPU and operating system when you run a program.
PuzzleScript
An open-source engine for making tile-based puzzle games in the browser, with a gallery of clever community creations to…
pwn.college
A hands-on cybersecurity education platform with lectures and practice challenges that teach hacking skills from the bas…
Python Data Science Handbook
The full text of Jake VanderPlas's handbook, with Jupyter notebooks on IPython, NumPy, Pandas, Matplotlib, and Scikit-Le…
Python for Everybody
A free course for learning Python from scratch, with lessons, exercises, and materials that take beginners from basic sy…
QRZ.com
A callsign lookup database and community hub where amateur radio operators showcase their stations and connect with othe…
Quantum Country
An experimental textbook on quantum computing by Andy Matuschak and Michael Nielsen that embeds spaced-repetition flashc…
Quayola
The portfolio of artist Quayola, whose algorithmic works include robot-carved unfinished sculptures, generative landscap…
R for Data Science
A free online book that teaches data science with R, covering how to import, tidy, transform, visualize and model data u…
Rachel by the Bay
A prolific engineer's war stories from decades of production systems, outages, and debugging at large tech companies, to…
Railway-News
A rail industry news portal covering operators, new rolling stock, signalling, and infrastructure projects from railways…
RANDOM.ORG
A true random number service powered by atmospheric noise since 1998, with dice rollers, list shufflers, and coin flippe…
rane's moonsugar musings
A homepage dressed up like an old Amiga desktop, with memory counters, a changelog, a blog about games and music, self-m…
Raspberry Pi
The official home of Raspberry Pi single-board computers and microcontrollers used for learning, hobby projects, and emb…
Raspberry Pi Foundation
The charity's learning hub for young people, with coding projects, free educational resources and teaching materials bui…
Raven Kwok
Portfolio of an artist creating generative installations and applications, including Staircase, a cellular-automata piec…
Ray Tracing in One Weekend
A free, public-domain book series that walks you step by step through writing your own ray tracer, from first gradient i…
Raymond Camden
A long-running developer blog by Raymond Camden covering web development, JavaScript, serverless, and AI, with practical…
R-bloggers
A blog aggregator collecting news and tutorials from hundreds of R bloggers, a steady feed of data science and statistic…
RC Universe
A broad radio-control hobby community covering planes, cars, boats, and helicopters with forums, reviews, and event list…
RCATheremin.com
A deep archive of the instruments Leon Theremin designed and built, with a registry and map of surviving 1929 RCA therem…
RCCrawler
A radio-control forum focused on crawlers and off-road RC vehicles, with build threads, reviews, and technical troublesh…
RCGroups
The largest radio-control hobby forum, covering scratch-built planes, drones, and cars with build logs and troubleshooti…
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