Ritmo

Smart Audio Toolkit in your browser

What it does

A smart tool to capture audio, analyze BPM, tap tempo, manage recordings, and use a metronome.

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 · 26d ago · baselashraf81.github.io

IM
I made an open-source laptop from scratch▲3,237
Hello! I'm Byran. I spent the past ~6 months engineering a laptop from scratch. It's fully open-source on GH at: https://github.com/Hello9999901/laptop
Dev tools · 2025 · byran.ee
TI
Tetris in a PDF▲1,289
I realized that the PDF engines of modern desktop browsers (PDFium and PDF.js) support JavaScript with enough I/O primitives to make a basic game like Tetris. It was a bit tricky to find a union of features that work in both engines, but in the end it turns out that showing/hiding annotation "fields" works well to make monochrome pixels, and keyboard input can be achieved by typing in a text input box. All in all it's quite janky but a nice reminder of how general purpose PDF scripting can be. The linked PDF is all ASCII so you can just open it in a text editor, or have a look at…
Life & fun · 2025 · th0mas.nl
21st.dev▲1,211
Github + Pinterest to make your AI websites look beautiful
Dev tools · 2025 · 21st.dev
Raycast Focus▲990
Stay in flow by blocking distracting apps and websites
Work · 2025 · raycast.com
JoggAI 2.0: AI Avatar Generator▲967
Create lifelike, personalized AI avatars from text prompts
AI · 2025 · jogg.ai
Lovable + Builder.io▲873
Turn Figma designs into full stack apps with AI
Dev tools · 2025 · figma.com