Open-source simulation software
1601 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.
1601 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| jeshraghian/snntorch snnTorch is a Python library for gradient-based deep learning with spiking neural networks, built as an extension of PyTorch. It provides s… | 68 | 2075 | active |
| bitshifter/glam-rs glam is a fast linear algebra library for Rust providing vectors, matrices, quaternions, and affine transformation types for games and grap… | 76 | 2071 | stable |
| TurtleBot3 Official ROS packages for the ROBOTIS TurtleBot3 mobile robot platform, providing drivers, bringup, and core launch/configuration files. It… | 84 | 2065 | active |
| facebookresearch/theseus Theseus is a PyTorch-based library for building custom differentiable nonlinear optimization layers, supporting problems in robotics and vi… | 23 | 2060 | active |
| AndreRH/hangover Hangover is a compatibility layer that runs x86_64 and x86_32 Windows applications on ARM64 (aarch64) Linux by combining Wine with emulator… | 94 | 2049 | active |
| SpinalHDL SpinalHDL is an open-source Scala-based hardware description language (HDL) library for describing digital hardware at the register-transfe… | 87 | 2045 | active |
| a1studmuffin/SpaceshipGenerator A Blender add-on script that procedurally generates 3D spaceship models from a random seed. It builds hulls, adds details like engines, ant… | 23 | 7825 | maintenance |
| ezEngine/ezEngine ezEngine is a free, open source C++ game engine with a modular, plugin-based architecture and a feature-rich editor. It provides a full ECS… | 88 | 2032 | active |
| MoveIt Motion Planning Framework MoveIt is an open-source motion planning framework for ROS and ROS 2 that provides manipulation, inverse kinematics, collision checking, an… | 75 | 2024 | stable |
| BanjoRecomp/BanjoRecomp A native PC port of Banjo-Kazooie built by statically recompiling the original N64 ROM using N64: Recompiled, with RT64 as the rendering en… | 74 | 2021 | active |
| pConst/basic_verilog A collection of reusable, synthesizable Verilog/SystemVerilog modules for FPGA projects, including UART, SPI, FIFO, PWM, debounce, synchron… | 61 | 2021 | active |
| NVIDIA-RTX/NVRHI NVRHI (NVIDIA Rendering Hardware Interface) is a C++ library providing a common abstraction layer over Direct3D 11, Direct3D 12, and Vulkan… | 75 | 2020 | active |
| fogleman/sdf A Python library for generating 3D meshes from signed distance functions (SDFs) with a simple, operator-based API supporting constructive s… | 76 | 2011 | stable |
| OpenMM OpenMM is a high-performance toolkit and library for molecular dynamics simulation, with optimized GPU-accelerated kernels. It can be used … | 94 | 2000 | stable |
| djhworld/simple-computer A Go-based simulator of the 16-bit CPU described in 'But How Do It Know?' by J. Clark Scott, built from NAND gates up through registers, RA… | 66 | 1998 | active |
| materialsproject/pymatgen Pymatgen (Python Materials Genomics) is a robust open-source Python library for materials analysis, defining core classes for crystal struc… | 99 | 1997 | stable |
| LCAV/pyroomacoustics Pyroomacoustics is a Python package for audio signal processing in indoor scenarios, combining a fast C++ room acoustics simulator (image s… | 72 | 1993 | stable |
| 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 |
| pythonOCC pythonocc-core is a Python package providing 3D modeling and data exchange features based on the OpenCascade Technology (OCCT) CAD kernel. … | 87 | 1980 | active |
| HybridRobotics/berkeley-humanoid-lite Berkeley Humanoid Lite is the open-source codebase for a sub-$5,000 3D-printed humanoid robot platform from UC Berkeley. It includes Isaac … | 51 | 1980 | active |
| cra-ros-pkg/robot_localization robot_localization is a ROS package of nonlinear state estimation nodes (EKF, UKF, and navsat_transform) for fusing IMU, odometry, and othe… | 61 | 1966 | stable |
| 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 |
| sarah-walker-pcem/pcem PCem is an emulator that reproduces classic IBM PC-compatible hardware, allowing users to run old operating systems and software on modern … | 68 | 1946 | active |
| google-deepmind/lab DeepMind Lab is a customisable 3D learning environment built on Quake III Arena (ioquake3) that provides navigation and puzzle-solving task… | 23 | 7387 | maintenance |
| 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 |
| prettymuchbryce/easystarjs easystar.js is a small (~7kb) asynchronous A* pathfinding library for JavaScript, usable in HTML5 games and interactive projects. It works … | 32 | 1938 | stable |
| 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 |
| mgerdes/Open-Golf Open Golf is a cross-platform 3D minigolf game written in C using the Sokol libraries, with custom physics for ball collision and a built-i… | 32 | 1931 | active |
| Hummingbirdv2 E203 Hummingbirdv2 E203 is an open-source ultra-low power 32-bit RISC-V processor core and SoC written in Verilog, developed by Nuclei System Te… | 75 | 1925 | stable |
| 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 |
| brunosimon/folio-2025 Folio 2025 is Bruno Simon's interactive 3D portfolio website, a drivable open-world experience built with Three.js (WebGL/WebGPU via TSL) a… | 53 | 1915 | active |
| sixthsurge/photon Photon is a gameplay-focused shader pack for Minecraft written in GLSL, adding realistic lighting, shadows, water, clouds, and post-process… | 71 | 1913 | 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 |
| gkjohnson/three-gpu-pathtracer A GPU-accelerated path tracing renderer for three.js built on three-mesh-bvh and WebGL 2. It provides physically based rendering with GGX m… | 99 | 1912 | 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 |
| gradientspace/geometry3Sharp geometry3Sharp is an open-source (Boost license) C# library for 2D/3D geometric computation and triangle mesh algorithms, with transparent … | 56 | 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 |
| Path of Building An offline build planner for Path of Exile 2 that calculates offence and defence stats, plans passive skill trees, skills, and items. It is… | 83 | 1895 | active |
| stateright/stateright Stateright is a Rust actor library with an embedded model checker for implementing distributed systems, including a web UI for exploring sy… | 44 | 1889 | active |
| cpmech/gosl Gosl is a Go scientific library providing linear algebra, eigenvalue solvers, FFTs, random numbers, probability distributions, optimization… | 98 | 1884 | 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 |
| koide3/glim GLIM is a versatile and extensible point cloud-based 3D localization and mapping (SLAM) framework written in C++. It performs direct multi-… | 76 | 1881 | 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 |
| NVlabs/curobo cuRobo is a CUDA-accelerated Python library for robot motion generation built on PyTorch, CUDA, and Warp. It provides GPU-parallel algorith… | 75 | 1865 | active |
| okalachev/flix Flix is an open-source ESP32-based quadcopter flight controller and firmware built from scratch in Arduino C++, designed for education and … | 82 | 1864 | active |
| RoboVerseOrg/RoboVerse RoboVerse is a unified platform, dataset, and benchmark for scalable and generalizable robot learning, providing tasks, robots, scenes, ass… | 65 | 1863 | active |
| 0x23/MicroManipulatorStepper An open-source, low-cost motorized XYZ micro-manipulator motion control platform achieving sub-micrometer precision, built with 3D-printed … | 61 | 1862 | active |
| mkazhdan/PoissonRecon An implementation of Poisson Surface Reconstruction for turning oriented point clouds into watertight 3D meshes, evolved into a general ada… | 55 | 1858 | stable |
| probcomp/Gen.jl Gen.jl is a general-purpose probabilistic programming system embedded in Julia that lets users write generative models as probabilistic pro… | 58 | 1851 | active |
| boundless-large-model/boundless-world-model Boundless-World-Model (BWM) is a physically consistent, action-conditioned video world model built on Wan2.2-TI2V-5B that acts as a low-cos… | 58 | 1840 | active |
| AgiBot X1 The inference module of the open-source AgiBot X1 humanoid robot software stack, providing model inference, platform drivers, and simulatio… | 25 | 1835 | active |
| graphhopper/jsprit jsprit is a Java-based open-source toolkit for solving rich Traveling Salesman Problems (TSP) and Vehicle Routing Problems (VRP) using a si… | 65 | 1833 | active |
| UPBGE/upbge UPBGE is a fork of Blender that continues development of the Blender Game Engine after its removal from official Blender. It cleans up and … | 85 | 1831 | active |
| nvidia-isaac/cuVSLAM cuVSLAM is NVIDIA's CUDA-accelerated library for real-time visual odometry and simultaneous localization and mapping (SLAM). It supports mu… | 78 | 1824 | active |
| artivis/manif manif is a header-only C++11 library for Lie theory with Python 3 wrappers, providing common Lie groups (SO(2), SE(2), SO(3), SE(3), SE_2(3… | 62 | 1821 | 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 |
| MakeYourPet/hexapod An open-source project providing 3D-printable STL files, wiring diagrams, and build instructions for constructing a hexapod (six-legged) ro… | 32 | 1817 | active |
| dosbox-staging/dosbox-staging DOSBox Staging is a modern continuation of the DOSBox DOS emulator with advanced graphics, sound, and emulation features and current develo… | 89 | 1814 | active |
| allenai/ai2thor AI2-THOR is an open-source platform from the Allen Institute for AI providing near photo-realistic, interactable 3D environments (iTHOR, Ma… | 42 | 1809 | 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 |
| s-macke/VoxelSpace A minimal implementation of the Voxel Space terrain rendering algorithm used in the 1992 game Comanche, written in C in under 20 lines of c… | 32 | 6792 | maintenance |
| Hoverboard FOC Firmware Open-source firmware that replaces the stock software on hoverboard mainboards with Field Oriented Control (FOC) for BLDC motors. It delive… | 69 | 1807 | active |
| AppliedEnergistics/Applied-Energistics-2 Applied Energistics 2 is a Minecraft mod focused on matter/energy-based digital storage, automation, and auto-crafting. It provides network… | 94 | 1803 | active |
| microsoft/DirectXMath DirectXMath is an all-inline SIMD C++ linear algebra library for games and graphics applications, supporting SSE, AVX, and ARM NEON instruc… | 79 | 1801 | stable |
| Timefold Solver Timefold Solver is an open-source, embeddable constraint satisfaction and optimization engine for Java and Kotlin, continuing Red Hat's Opt… | 96 | 1799 | active |
| ultraembedded/riscv A 32-bit RISC-V CPU core (RV32IMZicsr) written in synthesizable Verilog 2001, accompanied by an instruction set simulator. It supports user… | 32 | 1798 | stable |
| chungmin99/pyroki PyRoki is a modular Python toolkit for robot kinematic optimization built on JAX, providing differentiable forward kinematics from URDFs, c… | 50 | 1797 | active |
| microsoft/CyberBattleSim CyberBattleSim is a Python-based experimentation and research platform from Microsoft that simulates abstract enterprise network environmen… | 75 | 1794 | 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 |
| rsheldiii/KeyV2 A parametric keycap and keyset construction library for mechanical keyboards, written in OpenSCAD. It lets users programmatically generate … | 32 | 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 |
| 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 |
| zeux/niagara A Vulkan renderer written from scratch in C++ during live-streamed development sessions, experimenting with modern Vulkan rendering techniq… | 76 | 1778 | 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 |
| Skythinker616/foc-wheel-legged-robot A complete open-source wheel-legged balancing robot project covering mechanical design (SolidWorks), physics simulation (MATLAB/Simulink/Si… | 29 | 1769 | stable |
| crashkonijn/GOAP A multi-threaded Goal Oriented Action Planning (GOAP) library for Unity that lets developers build complex AI behaviors for game agents. It… | 71 | 1767 | 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 |
| OSS CAD Suite nextpnr is a vendor-neutral, timing-driven, open-source FPGA place and route tool written in C++. It supports multiple FPGA architectures i… | 87 | 1765 | 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 |
| GAP-LAB-CUHK-SZ/gaustudio GauStudio is a modular PyTorch framework for 3D Gaussian Splatting (3DGS) research and development, supporting novel view synthesis, 3D rec… | 46 | 1763 | 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 |
| xioTechnologies/Fusion Fusion is a C library for sensor fusion on Inertial Measurement Units (IMUs), implementing an AHRS algorithm that combines gyroscope, accel… | 75 | 1744 | stable |
| 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 |
| xibyte/jsketcher JSketcher is a parametric 2D and 3D CAD modeler written in pure JavaScript/TypeScript that runs entirely in the browser with no server-side… | 54 | 1743 | active |
| quantumlib/OpenFermion OpenFermion is an open-source Python library for compiling and analyzing quantum algorithms that simulate fermionic systems, including quan… | 86 | 1741 | 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 |
| google-research/circuit_training AlphaChip (circuit_training) is Google's open-source framework for generating chip floorplans using distributed deep reinforcement learning… | 59 | 1730 | active |