Life & fun · September 18, 2014
Papertrailer – Your digital filing cabinet
Does the same job
all alternatives →- PIPaperd.ink – Open-source e-paper development board2021 · paperd.ink · ▲232
- OPOpen Paperless – Scan, index, and archive paper documents2017 · github.com · ▲285
- POPapercups – Open-source alternative to Intercom2021 · papercups.io · ▲148
- PLPaperman – LaTeX editor with a Markdown feel2014 · paperman.patricklorio.com · ▲120
- PCPaperstencil – cross between word processor and web form2014 · github.com · ▲72
- SYSheetHub – Your notes and gists all in one place2020 · sheethub.io · ▲51
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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 · 27d ago · baselashraf81.github.io
