iYarrow
Divination that shows its work — free entropy, free chart
What it does
iYarrow pairs I Ching casting (the question in front of you) with Zi Wei Dou Shu natal charts (the life it's set against). Both free to try, no account needed. Casting isn't a button — sweep a live star field to fill an entropy pool, then touch three times to draw the hexagram (梅花易數 method, open-sourced separately, ~190 stars). Readings state both sides plainly — a frame to think with, not a verdict. Natal chart + full reading: $0. Credit packs only fund extra casts/chat beyond a free tier.
Does the same job
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Eastern Divination 2.011d ago · eastern-divination.vercel.app · ▲1Value before sign-in for bilingual I Ching and BaZi
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I've been working on new mind psychology visualizations of time and have created a unique clock to work in the background of my iterm2 transparent vim that has been really helping me focus my mind on complex code, notes, thinking. So have published it for free, it's a one page app, so you can easily copy the HTML code and host it yourself. It's your unique clock for your minds eye.
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Life & fun · 26d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
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Life & fun · 9d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com