I made an app that lets you trade your books with anyone in the USA

Does the same job

TL
The load-bearing vocabulary of Claude▲703
Life & fun · 10d ago · louisabraham.github.io
iPhone app takes simultaneous images from 2 lenses, fuses into 1 photo▲329
Photosynthesis fires two of your iPhone
Life & fun · 28d ago · photosynthesis.camera
SoloUno▲310
Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io
Scroll through all 43252003274489856000 Rubik's Cube states▲295
Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is
Expeditione▲265
The Interactive 3D Encyclopedia
Life & fun · 21d ago · expeditione.fun
Eigendrum - Draw any shape and hear what it sounds like as a drum▲243
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 · 27d ago · baselashraf81.github.io

Admin Portal (by WorkOS)▲1,410
Pre-built wizard for configuring Single Sign-On (SSO/SAML)
Dev tools · 2020 · workos.com
Sidekick Browser▲1,051
The fastest browser built for work.
Work · 2020 · perplexity.ai
PFPMaker▲1,027
Create an awesome profile pic from any photo
Growth · 2020 · pfpmaker.com
Screenity▲878
The most powerful screen recorder for Chrome
Dev tools · 2020 · chromewebstore.google.com
Notion Timeline▲778
Plot all your projects chronologically
Work · 2020 · notion.so
IR
I Rebuilt MySpace from 2007▲726
Life & fun · 2020 · spacehey.com