ChatSim

Chat with anyone, anywhere free of charge w/o a phone plan

Visit site ↗Alternativestop 22% of February 2015

What it does

ChatSim lets you stay in touch wherever you are. With it, you can send messages and emojis to your friends, family and loved ones from more than 160 countries with the compatible apps like Whatsapp, Line, Kakao, BBM and many others. Pay it once a year, get the best coverage in every spot of the world.

Does the same job

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WhatSim2015 · ▲264
SIM card with unlimited global WhatsApp use
ChatApp2020 · ▲326
Add WhatsApp chat to your website for free
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Chat on WhatsApp, Telegram, LINE & more in 1 single place
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Quorum2020 · ▲314
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Send personalized mass WhatsApp messages

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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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