Open-source simulation software
698 open-source libraries, tools and applications tagged simulation, ranked by how closely simulation is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
698 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| orbitersim/orbiter Orbiter is an open-source space flight simulator based on Newtonian mechanics, letting users pilot historic, hypothetical, or fictional spa… | 66 | 1986 | active |
| rlguy/Blender-FLIP-Fluids A Blender addon providing a high-quality FLIP-based liquid fluid simulation engine, developed since 2016 and tightly integrated into Blende… | 83 | 1953 | active |
| tgstation/tgstation The /tg/station codebase for Space Station 13, a round-based multiplayer roleplaying game set on a space station, written in BYOND's DM lan… | 68 | 1942 | active |
| tum-pbs/PhiFlow PhiFlow is an open-source Python simulation toolkit for solving partial differential equations with support for optimization and machine le… | 63 | 1939 | active |
| B3D Framework B3D Framework (formerly Banshee 3D) is a modern C++17 library providing a foundation for high-performance game engines and real-time graphi… | 77 | 1938 | active |
| fan-ziqi/robot_lab robot_lab is a reinforcement learning extension library for robots built on top of NVIDIA IsaacLab, providing preconfigured locomotion envi… | 78 | 1937 | active |
| OpenLoco/OpenLoco OpenLoco is an open-source C++ re-implementation of Chris Sawyer's Locomotion, a transport company construction and management simulation g… | 96 | 1918 | active |
| pioneerspacesim/pioneer Pioneer is an open-source, open-ended space adventure game set in the Milky Way galaxy, inspired by Elite and Frontier. It features procedu… | 86 | 1918 | active |
| dynamicslab/pysindy PySINDy is a Python library for discovering governing equations of dynamical systems from measurement data using the Sparse Identification … | 67 | 1913 | active |
| InteractiveComputerGraphics/SPlisHSPlasH SPlisHSPlasH is an open-source C++ library for physically-based fluid simulation using the Smoothed Particle Hydrodynamics (SPH) method. It… | 95 | 1906 | active |
| 2394425147/astrodx AstroDX is a free, open-source mobile simulator of the maimai arcade rhythm game, built as a clean-room implementation without original arc… | 91 | 1901 | active |
| Nicholas-L-Johnson/flip-card A business card built on an RP2350 microcontroller that runs a FLIP (fluid-implicit-particle) fluid simulation on its display, including Ki… | 54 | 1900 | active |
| simh/simh SIMH is a collection of highly portable simulators for historically significant computer systems such as the DEC PDP series, VAX, IBM mainf… | 66 | 1882 | active |
| alexliniger/MPCC A C++ and Matlab implementation of a Model Predictive Contouring Controller (MPCC) for autonomous racing, developed at ETH Zurich's Automat… | 64 | 1879 | active |
| tobspr-games/shapez.io shapez is an open-source, minimalist base-building game inspired by Factorio, where players automate the extraction, cutting, rotating, mer… | 65 | 6981 | maintenance |
| BobbyAnguelov/Esoterica Esoterica is an MIT-licensed prototype C++ game engine framework intended as a starter pack for building custom engines, an R&D testbed, or… | 83 | 1849 | active |
| ViroReact ViroReact is an open-source MIT-licensed library for building augmented reality, virtual reality, and mixed reality experiences using React… | 98 | 1828 | active |
| VulkanSceneGraph VulkanSceneGraph (VSG) is a modern, high-performance scene graph library built on the Vulkan graphics/compute API, written in C++17 followi… | 91 | 1820 | active |
| NanoComp/meep Meep is a free, open-source finite-difference time-domain (FDTD) simulation package for solving Maxwell's equations in 1D, 2D, 3D, and cyli… | 95 | 1819 | active |
| su2code/SU2 SU2 is an open-source C++ suite for numerically solving partial differential equations and performing PDE-constrained optimization, primari… | 81 | 1808 | active |
| pelicanmapping/osgearth osgEarth is a C++ SDK for adding geospatially accurate 3D maps and terrain rendering to desktop applications, built on OpenSceneGraph and G… | 82 | 1805 | active |
| Julian-adv/OpenMMO An open-source MMORPG written in Rust where AI agents and human players connect through the same WebSocket protocol with no privileged API … | 82 | 1792 | active |
| pyfa-org/Pyfa Pyfa (Python Fitting Assistant) is a cross-platform desktop application for creating, experimenting with, and saving EVE Online ship fittin… | 97 | 1791 | active |
| buserror/simavr simavr is a lean, hackable Atmel AVR microcontroller simulator written in C, loading ELF/HEX firmware directly and emulating peripherals li… | 75 | 1790 | active |
| microsoft/MarS MarS is a financial market simulation engine powered by a generative foundation model, developed by Microsoft. It provides tools for simula… | 64 | 1790 | active |
| electronicarts/CnC_Red_Alert The officially released source code for Command & Conquer: Red Alert, a classic real-time strategy game by Westwood Studios, published by E… | 10 | 6704 | maintenance |
| ricktu288/ray-optics A free, open-source web application for creating and simulating 2D geometric optical scenes interactively. It supports a wide range of opti… | 90 | 1784 | active |
| google-deepmind/concordia Concordia is a Python library for building generative agent-based social simulations, using a tabletop role-playing game pattern where a Ga… | 83 | 1782 | active |
| chenjd/Render-Crowd-Of-Animated-Characters A Unity library that bakes skeletal animation data into an animation map texture and uses GPU instancing to render tens of thousands of ani… | 32 | 1777 | active |
| DanielChappuis/reactphysics3d ReactPhysics3D is an open-source C++ physics engine library for 3D simulations and games, providing rigid body dynamics, collision detectio… | 25 | 1775 | active |
| wrf-model/WRF The Weather Research and Forecasting (WRF) model is the official open-source numerical weather prediction system for atmospheric research a… | 80 | 1772 | active |
| Tong89/smartNode SmartNode is a space-based intelligent relay simulation platform that visualizes satellites, ground stations, relay links, and content-driv… | 49 | 1767 | active |
| VoxelPlugin/VoxelPluginFreeLegacy Voxel Plugin Legacy is a free Unreal Engine plugin for creating and editing voxel-based terrain and worlds in C++. It supports Unreal Engin… | 69 | 1765 | active |
| flexible-collision-library/fcl FCL is a C++ library for performing proximity queries on pairs of geometric models composed of triangles. It supports collision detection, … | 67 | 1762 | stable |
| TriAxis-Games/RealtimeMeshComponent An MIT-licensed Unreal Engine 5 plugin providing a high-performance component for rendering runtime-generated and runtime-modified geometry… | 80 | 1760 | active |
| robocasa/robocasa RoboCasa is a large-scale simulation framework for training and benchmarking generally capable robots on everyday tasks, focused on kitchen… | 78 | 1759 | active |
| lo-th/3d.city 3d.city is an open-source, browser-based 3D city building game rendered with Three.js via WebGL2 or WebGPU. It uses the micropolisJS simula… | 63 | 1756 | active |
| google-deepmind/mujoco_mpc MuJoCo MPC (MJPC) is an interactive application and C++ software framework from Google DeepMind for real-time predictive control with the M… | 67 | 1744 | active |
| deal.II deal.II is a C++ library for solving partial differential equations using adaptive finite elements, with support for dimension-independent … | 87 | 1737 | stable |
| robin-shaun/XTDrone XTDrone is a customizable UAV simulation platform built on PX4, ROS, and Gazebo, supporting multi-rotors, fixed-wing, VTOL vehicles, and ot… | 77 | 1733 | active |
| HackerPoet/NonEuclidean A non-Euclidean rendering engine for 3D scenes written in C++ with OpenGL, targeting Windows. It ships with several demo rooms that showcas… | 32 | 6459 | maintenance |
| Kitware/ParaView ParaView is an open-source, multi-platform data analysis and visualization application built on the Visualization Toolkit (VTK), with a Qt-… | 77 | 1712 | stable |
| BindsNET/bindsnet BindsNET is a Python package for simulating spiking neural networks (SNNs) built on PyTorch tensor functionality, running on CPUs or GPUs. … | 81 | 1704 | active |
| amazon-far/holosoma Holosoma is a Python framework for training and deploying reinforcement learning policies on humanoid robots, supporting locomotion and who… | 85 | 1702 | active |
| pybamm-team/PyBaMM PyBaMM (Python Battery Mathematical Modelling) is an open-source Python package for fast, flexible physics-based battery simulation. It pro… | 100 | 1701 | active |
| pyscf/pyscf PySCF is a Python-based framework for quantum chemistry simulations, providing electronic structure methods such as Hartree-Fock, density f… | 91 | 1699 | stable |
| SciML/ModelingToolkit.jl ModelingToolkit.jl is a Julia-based acausal, equation-based modeling framework and computer algebra system for symbolic-numeric computation… | 95 | 1694 | active |
| hashintel/hash HASH is an open-source, multi-tenant platform for building self-maintaining knowledge graphs and process graphs, powered by the hgres graph… | 97 | 1675 | active |
| maziarraissi/PINNs The original reference implementation of Physics-Informed Neural Networks (PINNs), which train neural networks to solve and discover nonlin… | 59 | 6160 | maintenance |
| rafaelvcaetano/melonDS-android An Android port of melonDS, a Nintendo DS and DSi emulator, written in Kotlin. It offers a ROM library, layout editor, dark theme, and inte… | 77 | 1657 | active |
| gaea-godot/gaea Gaea is a procedural generation add-on for Godot 4 that uses a node-based graph system to build customizable generation pipelines for 2D an… | 71 | 1653 | active |
| Uriopass/Egregoria Egregoria is an open-source 3D city-building game written in Rust with wgpu, inspired by Cities: Skylines but without a grid. It emphasizes… | 30 | 1647 | active |
| nophead/NopSCADlib NopSCADlib is an OpenSCAD library of parametric part models ('vitamins') for 3D printers and electronics enclosures, plus a project framewo… | 49 | 1636 | active |
| albar965/littlenavmap Little Navmap is a free open-source desktop flight planner, navigation tool, moving map, and airport information system for flight simulato… | 77 | 1623 | stable |
| open-gigaai/giga-world-0 GigaWorld-0 is a unified world model framework that acts as a data engine for Vision-Language-Action (VLA) learning in embodied AI. It comb… | 38 | 1616 | active |
| NVlabs/sionna Sionna is an open-source, GPU-accelerated, differentiable Python library from NVIDIA for research on communication systems. It comprises Si… | 91 | 1615 | active |
| fofapro/fapro FaPro is a free, cross-platform, single-file mass network protocol server simulator written in Python. It can start or stop many fake netwo… | 23 | 1614 | active |
| sideeffects/HoudiniEngineForUnreal SideFX's official Unreal Engine plugin that integrates Houdini's procedural workflow into the Unreal editor via Houdini Digital Assets (HDA… | 90 | 1607 | active |
| Godot RL Agents Godot RL Agents is an open-source Python package that bridges games built in the Godot Engine with reinforcement learning algorithms, enabl… | 60 | 1605 | active |
| Tencent-Hunyuan/HY-WorldPlay HY-WorldPlay (HY-World 1.5) is Tencent Hunyuan's open-source framework for interactive 3D world modeling, generating explorable 3D scenes f… | 52 | 1604 | active |
| NatLabRockies/EnergyPlus EnergyPlus is a whole-building energy simulation program that models energy consumption and water use in buildings. It is developed in C++ … | 91 | 1602 | active |
| simulationcraft/simc SimulationCraft is a multi-player, event-driven combat simulator for World of Warcraft written in C++, modeling player character DPS in rai… | 76 | 1602 | active |
| KeepTrack.space KeepTrack is a TypeScript astrodynamics application that provides real-time 3D visualization of 50,000+ satellites and millions of debris o… | 96 | 1600 | active |
| horde3d/Horde3D Horde3D is a lightweight, shader-based 3D rendering and animation engine written in C++ with a clean C-style API. It provides a unified sce… | 84 | 1591 | active |
| kevinzakka/mink mink is a Python library for differential inverse kinematics built on the MuJoCo physics engine. It solves task-space objectives as a quadr… | 85 | 1582 | active |
| DiffEqML/torchdyn Torchdyn is a PyTorch library dedicated to numerical deep learning, providing tools for neural differential equations, implicit models, and… | 23 | 1580 | active |
| unitreerobotics/unitree_ros ROS packages providing robot descriptions and Gazebo simulation for Unitree robots (quadrupeds like Go1/Go2/A1 and humanoids like H1/G1). I… | 76 | 1578 | active |
| ArztSamuel/Applying_EANNs A 2D Unity simulation where cars learn to navigate courses using a feedforward neural network trained by a modified genetic algorithm. It s… | 39 | 1573 | stable |
| fogleman/nes An NES (Nintendo Entertainment System) emulator written in Go with a graphical menu for browsing ROMs. It emulates the 6502 CPU, PPU, and A… | 32 | 5660 | maintenance |
| baijiuyang/collision-avoidance2 A computational modeling framework for pedestrian moving-obstacle avoidance behavior, implementing Fajen-style steering and Cohen-style avo… | 69 | 1541 | active |
| Gazebo Gazebo Sim is an open source robotics simulator providing high-fidelity physics, rendering, and sensor models. It offers a graphical interf… | 69 | 1540 | active |
| leggedrobotics/ocs2 OCS2 is a C++ toolbox for formulating and solving nonlinear optimal control problems, with an emphasis on real-time Model Predictive Contro… | 66 | 1529 | active |
| copper-project/copper-rs Copper is a Rust runtime and SDK for building, running, recording, and deterministically replaying static robot task graphs, from Linux dow… | 100 | 1522 | active |
| sail-sg/envpool EnvPool is a C++-based batched environment pool with pybind11 bindings and a thread pool for high-performance parallel RL environment execu… | 96 | 1522 | active |
| enewhuis/liquibook Liquibook is a modern C++ order matching engine library providing the low-level components for matching buy and sell orders of fungible ass… | 23 | 1508 | stable |
| Core Flight System (cFS) NASA's Core Flight System (cFS) is a generic flight software architecture framework written in C, used on spacecraft ranging from flagship … | 86 | 1507 | stable |
| HKUST-Aerial-Robotics/FUEL FUEL is a C++/ROS framework for fast autonomous UAV exploration, built around an incremental Frontier Information Structure and hierarchica… | 32 | 1496 | stable |
| acados/acados acados is a modular C library providing fast embedded solvers for nonlinear optimal control problems, designed for real-time applications l… | 91 | 1493 | active |
| Aceinna/gnss-ins-sim A Python library for simulating GNSS/INS integrated navigation systems. It generates reference trajectories and synthetic IMU, GPS, odomete… | 23 | 1493 | active |
| saharan/works Source code for a collection of interactive browser-based creative works (Drops, Marimo, Life Universe, Bubbles, Jelly, Clock, Water, Chill… | 31 | 1489 | active |
| gpu-io gpu-io is a TypeScript WebGL library for composing GPU-accelerated computing workflows in the browser. It handles WebGL state management, s… | 32 | 1486 | active |
| fan-ziqi/rl_sar A C++ framework for simulation verification and physical deployment of reinforcement learning policies for robots, supporting quadruped, wh… | 74 | 1481 | active |
| mpusz/mp-units mp-units is a modern C++20/23/26 library providing compile-time-safe quantities and units of measurement, built on the ISO 80000 Internatio… | 71 | 1480 | active |
| MiroShark/MiroShark MiroShark is a universal swarm-intelligence engine that turns any document or scenario into a simulated world: it builds a Neo4j knowledge … | 60 | 1473 | active |
| Habrador/Computational-geometry A C# computational geometry library for Unity implementing intersection algorithms, triangulations (Delaunay, constrained Delaunay), Vorono… | 32 | 1470 | active |
| atb033/multi_agent_path_planning A Python collection of multi-agent/multi-robot path-planning algorithm implementations, including centralized planners (Prioritized Safe-In… | 23 | 1469 | active |
| LocoMuJoCo LocoMuJoCo is an imitation learning benchmark for whole-body locomotion control built on MuJoCo, featuring humanoid, quadruped, and musculo… | 70 | 1468 | active |
| jax-md/jax-md JAX MD is a Python library for molecular dynamics simulations built on JAX, making them hardware accelerated on CPU, GPU, and TPU and end-t… | 80 | 1465 | active |
| do-mpc/do-mpc do-mpc is an open-source Python toolbox for robust model predictive control (MPC) and moving horizon estimation (MHE) of nonlinear systems.… | 92 | 1464 | active |
| Dungeon Template Library Dungeon Template Library (DTL) is a C++11/14/17 library providing free resources and algorithms for procedural dungeon, terrain, and roguel… | 26 | 1464 | active |
| drwhut/tabletop-club Tabletop Club is a free, open-source multiplayer game for playing tabletop games like chess, cards, and board games in a physics-based 3D e… | 83 | 1463 | active |
| CDT CDT is a C++ library for generating constrained and conforming Delaunay triangulations. It is portable, dependency-free, and can be consume… | 93 | 1454 | stable |
| trilinos/Trilinos Trilinos is a collection of C++ libraries and an object-oriented software framework for solving large-scale, complex multi-physics engineer… | 98 | 1439 | stable |
| CliMA Earth System Model Oceananigans.jl is a Julia package for fast, flexible finite-volume simulations of incompressible fluid dynamics, solving nonhydrostatic an… | 95 | 1439 | active |
| misyltoad/VPhysics-Jolt Volt (VPhysics Jolt) is a drop-in replacement physics module for Valve's Source Engine, replacing the legacy IVP/Havok-based VPhysics with … | 29 | 1439 | active |
| OpenModelica OpenModelica is an open-source Modelica-based modeling, compilation, and simulation environment for industrial and academic use. It include… | 97 | 1431 | active |
| fegennari/3DWorld 3DWorld is a cross-platform OpenGL-based 3D game engine written in C++ with GLSL shaders, featuring procedural generation of terrain, citie… | 87 | 1431 | active |
| libraries/gameboy A full-featured, cross-platform GameBoy emulator written in Rust that runs GameBoy and GameBoy Color ROMs with video scaling, speed control… | 69 | 1427 | active |
| XPandora/PhysGaussian PhysGaussian is a research library that integrates Material Point Method (MPM) physics simulation with 3D Gaussian Splatting representation… | 52 | 1427 | active |
| Auburn/FastNoise2 FastNoise2 is a modular, node graph based procedural noise generation library written in modern C++17 with SIMD acceleration. It supports P… | 86 | 1421 | stable |