FlightCar

Free airport parking by renting your car to fellow members

Does the same job

Transfercar2014 · ▲148
Free one-way rental cars for flexible travellers
Top Airport Parking2017 · ▲70
Simple and affordable (AF) airport parking
Blucar2015 · ▲113
On-demand parking at the drop of a pin
On Air Parking2018 · ▲83
Ridiculously cheap and simple airport parking.
Skypicker2014 · ▲301
Find and book the best low-cost flights all around the world
Ride2015 · ▲120
Hassle-free ridesharing app with your coworkers

TL
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The Interactive 3D Encyclopedia
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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

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A book on how to build habit-forming products
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Free, beautifully designed logos instantly
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