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Multi-Joint dynamics with Contact. A general purpose physics simulator.

Toasts with real spring physics. One toast that morphs in place. No dependencies. React, Svelte, Vue and plain DOM.

Turn layered PSDs into editable Live2D models — automatic rigging, mesh/deformer generation, physics, animation, and .cmo3/ .moc3 export.

An open agentic toolkit for physics-based Real2Sim of Robot Manipulation Tasks

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West and Death Stranding 2.

Open-source deep-learning framework for building, training, and fine-tuning deep learning models using state-of-the-art Physics-ML methods

A contact solver for physics-based simulations involving 👚 shells, 🪵 solids, 🪢 rods, 🧱 rigid bodies and ⏳ sand.

✌️ A spring physics based React animation library

A project to digitalise results from physics into Lean.

Flutter UI kit implementing Apple's iOS 26/27 Liquid Glass design language - a comprehensive glass widget library with real shader-based blur, physics-driven jelly animations, and dynamic lighting. Works on every platform out of the box.

BootLoops 1.0: certified computational tools and house engines for exact and high-precision physics and quantitative science, built to be driven by LLM agents. MIT; docs CC BY 4.0.

SpECTRE is a code for multi-scale, multi-physics problems in astrophysics and gravitational physics.

Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well as heat.

Bullet Physics SDK: real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.

Direct port of the Bullet physics engine to JavaScript using Emscripten

High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton.

a 2D rigid body physics engine for the web ▲● ■

An image analysis library for medical physics

Box2D is a 2D physics engine for games

A coupling library and ecosystem for partitioned multi-physics and multi-scale simulations, including surface and volume coupling.

A game engine with a fully bindless, GPU-driven renderer featuring real-time path-traced global illumination, hardware ray tracing, and a physics simulation running at 200Hz, built over 12+ years of R&D

A collection of simple scripts to create 2D physics game, intended for giving workshops to a young audience

Collection of various algorithms in mathematics, machine learning, computer science and physics implemented in C++ for educational purposes.

Landgreen's public site: physics notes, n-gon

Examples of various Unity 2D Physics components and features.

FEATool Multiphysics - "Physics Simulation Made Easy" (Fully Integrated FEA, FEniCS, OpenFOAM, SU2 Solver GUI & Engineering CAE Simulation Platform)

Pure C# 3D real time physics simulation library, now with a higher version number.

Google DeepMind's software stack for physics-based simulation and Reinforcement Learning environments, using MuJoCo.

Pre-built implicit layer architectures with O(1) backprop, GPUs, and stiff+non-stiff DE solvers, demonstrating scientific machine learning (SciML) and physics-informed machine learning methods

Python-based Space Physics Environment Data Analysis Software