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Life & fun · February 14, 2012

HC

Hackershelf. Community curated collection of legally free books

In plain words

Hackershelf is a community-curated collection of legally free books available online. Launched in 2012, the platform allows users to discover and share books that are freely accessible, making it useful for readers seeking legitimate digital resources without cost. The collection is organized and maintained by the community, enabling users to contribute to and browse curated book selections across various topics.

written from the facts on this page · September 2026

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    Life & fun · 9d ago · louisabraham.github.io

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    Life & fun · 26d ago · everycube.alen.is

  • The Interactive 3D Encyclopedia

    Life & fun · 21d ago · expeditione.fun

  • 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, February 2012

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