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Best Physics Simulation Software in 2026

Physics simulation software can support classroom exploration, lesson creation, or modeling physical systems for technical work. Compared on 3D visuals, assessment tools, authoring tools, data export, delivery mode, free plan, lesson library, offline access, and paid from, these entries offer practical ways to assess how each tool fits your purpose. OpenSim, Xcos, and SimFlow are among the named options. Consider whether you need to build learning activities, assess students, or export results for another workflow, then weigh the listed access and pricing details.

  1. 1

    OpenFOAM

    by OpenFOAM
    Free plan LinuxMacSelf-hosted+1

    OpenFOAM brings simulation, mesh and post-processing tools together in a free toolbox, with ParaView support and several deployment platforms.

    7.7 Free plan Visit site
  2. 2

    OpenSim

    Free plan APILinuxMac+1

    OpenSim offers modeling, simulation and analysis tools with scripting options across several languages. Check the GUI platform limitation and plugin compatibility requirements before choosing it.

    7.7 Free plan Visit site
  3. 3

    ngspice

    Free plan LinuxMacSelf-hosted+1

    ngspice provides circuit simulation and model integration through netlist-based input, with no schematic capture.

    7.7 Free plan Visit site
  4. 4

    SimFlow

    by SimFlow
    Free plan LinuxMacWeb+1

    SimFlow offers a locally run CFD workflow, with a free option capped by mesh size and CPU count. Its commercial plans provide unlimited mesh and CPUs, but start at €8,000 per year.

    7.6 Free plan · paid from €8,000/user/yr · 30-day trial Visit site
  5. 5

    FeenoX

    Free plan APILinuxSelf-hosted+1

    FeenoX offers broad computational engineering capabilities through plain-text inputs and GNU/Linux installation options.

    7.6 Free plan Visit site
  6. 6

    Xcos

    by Xcos
    Free plan LinuxMacWindows

    Choose Xcos if you need a free desktop editor for building and simulating hybrid dynamical-system models, especially for industrial or academic work.

    7.5 Free plan Visit site
  7. 7

    ASCEND

    by ASCEND
    Free plan LinuxMacWindows

    ASCEND provides modeling, solving, unit handling, and thermodynamics capabilities in a free desktop package.

    7.4 Free plan Visit site
  8. 8

    MPTRAC

    by MPTRAC
    Free plan LinuxSelf-hostedWeb

    MPTRAC combines trajectory modeling, optional atmospheric process parameterizations, and multiple output formats for research use.

    7.4 Free plan Visit site
  9. 9

    myPhysicsLab

    by myPhysicsLab
    Free plan LinuxMacSelf-hosted+2

    myPhysicsLab combines interactive examples with tools for customizing and sharing simulations. Its dimensionless units require users to keep values consistent within each model.

    7.4 Free plan Visit site
  10. 10

    Open Source Physics

    by Open Source Physics
    Free plan AndroidiPhoneLinux+3

    Choose Open Source Physics if you want free physics curriculum resources alongside simulation, authoring, video-tracking, or data-analysis tools.

    7.3 Open source Visit site
  11. 11

    GNU FisicaLab

    Free plan LinuxWindows

    FisicaLab offers problem-solving tools across several physics topics, with unit options and examples in its documentation.

    7.3 Free plan Visit site
  12. 12

    PySDM

    Free plan LinuxSelf-hosted

    Choose PySDM if you need an open-source simulation building block for dispersed phases, particularly atmospheric cloud physics, and value its process examples and compute backend options.

    7.3 Free plan Visit site
  13. 13

    DynamicalSystems.jl

    by DynamicalSystems.jl
    Free plan LinuxMacWindows

    DynamicalSystems.jl offers a broad collection of analysis methods, documentation, and visualization options as a free Julia package.

    7.3 Free plan Visit site
  14. 14

    libCEED

    Free plan APILinuxSelf-hosted

    Choose libCEED if your application has its own discretization infrastructure and needs a low-level algebraic library with CPU and GPU implementation choices.

    7.3 Free plan Visit site
  15. 15

    LISE++

    Free plan LinuxMacWindows

    LISE++ is a strong fit for users who need free spectrometer and reaction modeling tools across its supported operating systems.

    7.3 Free plan Visit site
  16. 16

    Algodoo

    by Algodoo
    Free plan iPhoneMacWindows

    Choose Algodoo for free Mac or PC access to interactive 2D physics scene creation, classroom experimentation and a large scene library.

    7.3 Free plan Visit site
  17. 17

    VaMPy

    Free plan LinuxMacSelf-hosted+1

    VaMPy provides an end-to-end scripted workflow from vascular meshes through simulation and hemodynamic analysis.

    7.3 Free plan Visit site
  18. 18

    SimScale

    by SimScale
    Free plan Web

    SimScale offers a web-based route to engineering simulation across several physics areas, with collaboration and CAD integrations.

    7.2 Free plan Visit site
  19. 19

    Step

    Free plan Linux

    Step offers a range of physics simulations, editing controls, and visualization tools in a free Linux desktop application.

    7.2 Free plan Visit site
  20. 20

    FEST-3D

    by FEST-3D
    Free plan LinuxMac

    FEST-3D provides a broad set of flow models and numerical options for structured-grid aerodynamic simulations.

    7.2 Open source Visit site
  21. 21

    FDTDX

    Free plan LinuxSelf-hosted

    FDTDX provides a JAX-based workflow for photonic nanostructure simulation and optimization, with GPU support and GDS-related API functions.

    7.2 Free plan Visit site
  22. 22

    PySWMM

    Free plan LinuxMacWindows

    PySWMM provides Python-driven access to SWMM modeling, live simulations, controls, and result extraction without a license fee.

    7.2 Free plan Visit site
  23. 23

    Physics Classroom Physics Interactives

    Free plan AndroidiPhoneWeb

    Physics Classroom Physics Interactives provides a broad free set of introductory physics activities. Task Tracker adds classroom management and reporting for teachers who need those controls.

    7.1 Free plan Visit site
  24. 24

    pyuvsim

    Free plan LinuxMacWindows

    pyuvsim provides a broad, research-focused simulation environment with detailed instrument and sky modeling. Its Windows limitations and optional MPI setup matter when planning a workflow.

    7.1 Free plan Visit site
  25. 25

    PyAutoLens

    Free plan LinuxMacWindows

    Choose PyAutoLens if you need a free, offline package for detailed gravitational-lensing analysis across imaging, interferometer or point-source data.

    7.1 Free plan Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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