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    • Photoelectric Effect is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      00250Updated May 28, 2026May 28, 2026
    • Common code for alpha-decay, beta-decay, and radioactive-dating-game
      TypeScript
      GNU General Public License v3.0
      0020Updated May 28, 2026May 28, 2026
    • "Quantum Bound States" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      00320Updated May 28, 2026May 28, 2026
    • Alpha Decay is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      2060Updated May 28, 2026May 28, 2026
    • perennial

      Public
      Maintenance tools that won't change with different versions of chipper checked out
      TypeScript
      MIT License
      771056Updated May 28, 2026May 28, 2026
    • "Quantum Wave Interference" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      01310Updated May 28, 2026May 28, 2026
    • chipper

      Public
      Tools for developing and building PhET interactive simulations.
      TypeScript
      MIT License
      16171849Updated May 28, 2026May 28, 2026
    • binder

      Public
      Generates and publishes documentation for PhET simulation components.
      JavaScript
      MIT License
      30131Updated May 28, 2026May 28, 2026
    • chains

      Public
      This application demonstrates the various types of strings that may appear in PhET simulations, and is intended to be used for testing string-translation tools.…
      JavaScript
      GNU General Public License v3.0
      2042Updated May 28, 2026May 28, 2026
    • "Resistance in a Wire" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      4132Updated May 27, 2026May 27, 2026
    • "Rutherford Scattering" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      4272Updated May 27, 2026May 27, 2026
    • phet-info

      Public
      Collection of information shared by PhET team members for the purpose of using github effectively and for other process-related topics.
      Python
      MIT License
      37101220Updated May 27, 2026May 27, 2026
    • rosetta

      Public
      PhET's Simulation Translation Utility
      TypeScript
      MIT License
      23574Updated May 27, 2026May 27, 2026
    • Reusable components based on Scenery that are specific to PhET simulations.
      TypeScript
      MIT License
      89671Updated May 26, 2026May 26, 2026
    • qa

      Public
      Quality Assurance Task Tracking
      JavaScript
      MIT License
      912100Updated May 26, 2026May 26, 2026
    • "Beta Decay" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      0010Updated May 26, 2026May 26, 2026
    • shred

      Public
      A library of JavaScript code that is used in PhET simulations that depict atoms, subatomic particles, and atomic structure. This was originally created to cont…
      TypeScript
      GNU General Public License v3.0
      6270Updated May 26, 2026May 26, 2026
    • "Build a Nucleus" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      5170Updated May 26, 2026May 26, 2026
    • tandem

      Public
      Simulation-side code for PhET-iO
      TypeScript
      MIT License
      60180Updated May 23, 2026May 23, 2026
    • dot

      Public
      A math library with a focus on mutable and immutable linear algebra for 2D and 3D applications.
      TypeScript
      MIT License
      714190Updated May 22, 2026May 22, 2026
    • sun

      Public
      User-interface components for PhET simulations, built on top of Scenery.
      TypeScript
      MIT License
      1361240Updated May 22, 2026May 22, 2026
    • scenery

      Public
      Scenery is an HTML5 scene graph.
      TypeScript
      MIT License
      17703440Updated May 21, 2026May 21, 2026
    • joist

      Public
      Joist is the main framework for PhET Interactive Simulations. Joist creates and displays the simulation content, home screen, navigation bar, About dialog, ena…
      TypeScript
      MIT License
      791020Updated May 21, 2026May 21, 2026
    • "Number Suite Common" contains code for use by sims that are part of the Number Suite
      TypeScript
      GNU General Public License v3.0
      1060Updated May 20, 2026May 20, 2026
    • "Kepler's Laws" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      1170Updated May 20, 2026May 20, 2026
    • axon

      Public
      Axon provides powerful and concise models for interactive simulations, based on observable Properties and related patterns.
      TypeScript
      MIT License
      712130Updated May 20, 2026May 20, 2026
    • "Making Tens" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      3162Updated May 20, 2026May 20, 2026
    • "Counting Common" contains code for use by sims that count with paper numbers or objects
      TypeScript
      GNU General Public License v3.0
      3010Updated May 20, 2026May 20, 2026
    • babel

      Public
      This repo contains the translated strings for PhET's simulations.
      Fluent
      MIT License
      9430Updated May 19, 2026May 19, 2026
    • "Circuit Construction Kit: Basics" is an educational simulation in HTML5, by PhET Interactive Simulations.
      TypeScript
      GNU General Public License v3.0
      1414500Updated May 19, 2026May 19, 2026
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