Postaway.space
A little piece of the past, sent your way.
What it does
Postaway brings the charm of vintage postcards to the digital world. Pick a destination, write a message, and we’ll randomly pair it with a vintage postcard you can share by link. It’s free to use. Love postcards? Join the Postaway Mail Club for a real vintage postcard in the mail, plus other surprises. You never know what you’ll get.
Send a free vintage digital postcard in minutes, or join the Postaway Mail Club for real vintage postcards delivered by post to the US, UK, Australia, Singapore, India, and worldwide.
Send a free vintage digital postcard online. Pick a country, write a short note, and share a link with someone you love. Or join the Postaway Mail Club for real vintage postcards by post — US, UK, Australia, Singapore, India, andfrom postaway.space
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- CACreate and mail a free postcard2019 · postcardmailer.herokuapp.com · ▲133
hey postcard - digital postcardsAug 2026 · ▲90delivered tomorrow morning at a random time between 8 -10 AM
More life & fun this month
the category →- TL
Life & fun · 9d ago · louisabraham.github.io
Photosynthesis fires two of your iPhone
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
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