Browse free open source Simulation software and projects for Windows and Linux below. Use the toggles on the left to filter open source Simulation software by OS, license, language, programming language, and project status.

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  • 1
    GMAT

    GMAT

    General Mission Analysis Tool

    The General Mission Analysis Tool (GMAT) is an open-source tool for space mission design and navigation. GMAT is developed by a team of NASA, private industry, and public and private contributors. The GMAT development team is pleased to announce the release of GMAT version R2025a. For a complete list of new features, compatibility changes, and bug fixes, see the R2025a Release Notes in the Users Guide.
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    Downloads: 1,010 This Week
    Last Update:
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  • 2
    QBlade

    QBlade

    Wind Turbine Rotor Design and Simulation

    QBlade 2.0 released!!!! QBlade 2.0 released!!!! QBlade 2.0 released!!!! This project page is discontinued, you find our new webpage at: https://qblade.org/ This project page wont be updated in the future, however, everything in the "Files" section and the Forum Content will remain avaliable to everyone...
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    Downloads: 51 This Week
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  • 3

    Frame3DD

    Static and Dynamic Structural Analysis of 2D and 3D frames.

    FRAME3DD is a program for the static and dynamic structural analysis of two- and three-dimensional frames and trusses with elastic and geometric stiffness.
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    Downloads: 59 This Week
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  • 4
    OpenRocket
    An Open Source model rocket simulator.
    Downloads: 46 This Week
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    Grafana: The open and composable observability platform

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  • 5

    OS X Portable Applications

    Portable OS X FOSS applications

    OS X FOSS portable applications are packaged so you can carry around on any portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device (or also on your internal hard disk), taking your preferences with you.
    Downloads: 36 This Week
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  • 6
    GenX

    GenX

    X-Ray and Neutron Reflectivity Modeling

    GenX is a scientific program to refine x-ray refelcetivity, neutron reflectivity and surface x-ray diffraction data using the differential evolution algorithm. GenX is very modular and highly extensible and can be used as a general fitting program.
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    Downloads: 70 This Week
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  • 7
    GridLAB-D
    GridLAB-D is a new power system simulation tool that provides valuable information to users who design and operate electric power transmission and distribution systems, and to utilities that wish to take advantage of the latest smart grid technology. It incorporates advanced modeling techniques with high-performance algorithms to deliver the latest in end-use load modeling technology integrated with three-phase unbalanced power flow, and retail market systems. Historically, the inability to effectively model and evaluate smart grid technologies has been a barrier to adoption; GridLAB-D is designed to address this problem. User documentation can be found at: http://gridlab-d.shoutwiki.com/wiki/Quick_links The source code is available from GitHub. See https://github.com/gridlab-d/gridlab-d. Issue tracking is handled by GitHub. See https://github.com/gridlab-d/gridlab-d/issues.
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    Downloads: 24 This Week
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  • 8
    GLUI is a GLUT-based C++ user interface library which provides controls such as buttons, checkboxes, radio buttons, and spinners to OpenGL applications. It is window-system independent, using GLUT or FreeGLUT.
    Downloads: 14 This Week
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  • 9
    Monte Carlo eXtreme (MCX)

    Monte Carlo eXtreme (MCX)

    Physically accurate and validated GPU ray-tracer

    MCX is a GPU-accelerated, general-purpose, physically-accurate and feature-rich 3-D light transport simulator. It is one of the fastest simulators because it can use tens of thousands of GPU threads to simulate photons in parallel.
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    Downloads: 60 This Week
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    Total Network Visibility for Network Engineers and IT Managers

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  • 10
    A graphical interface for solving exterior ballistics problems, based on the excellent GNU exterior ballistics library. This software generates valid 3-DOF solutions to small arms trajectories, including wind and atmospheric corrections.
    Downloads: 11 This Week
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  • 11
    gVirtualXRay

    gVirtualXRay

    Virtual X-Ray Imaging Library on GPU

    gVirtualXRay is a C++ library to simulate X-ray imaging. It is based on the Beer-Lambert law to compute the absorption of light (i.e. photons) by 3D objects (here polygon meshes). It is implemented on the graphics processing unit (GPU) using the OpenGL Shading Language (GLSL). SimpleGVXR is a smaller library build on the top of gVirtualXRay. It provides wrappers to Python, R, Ruby, Tcl, C#, Java, and GNU Octave.
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    Downloads: 10 This Week
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  • 12
    iradina
    Simulation of ion beam irradiation
    Downloads: 30 This Week
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  • 13
    A package for transient and steady state simulation of organic solar cells.
    Downloads: 26 This Week
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  • 14
    pyPENELOPE
    An application programming (API) and graphical user interface (GUI) to facilitate the use of PENELOPE's program PENEPMA.
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    Downloads: 22 This Week
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  • 15
    ALAMODE

    ALAMODE

    Ab initio simulator for thermal transport and lattice anharmonicity

    ALAMODE is designed for analyzing lattice anharmonicity and lattice thermal conductivity of solids. By using an external DFT package such as VASP and Quantum ESPRESSO, you can extract harmonic and anharmonic force constants straightforwardly with ALAMODE. Using the anharmonic force constants, you can also calculate lattice thermal conductivity from first principles. For more information about ALAMODE, please visit the following webpages: Documentation : http://alamode.readthedocs.io/en/latest/ git repository : https://github.com/ttadano/alamode
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    Downloads: 12 This Week
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  • 16
    jQuantum
    jQuantum is a Java program to simulate a quantum computer, to design quantum circuits, and to visualize the execution of quantum algorithms. Another main purpose, however, is to create images in your head, and thereby - understanding.
    Downloads: 5 This Week
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  • 17
    FEATool Multiphysics - FEA Toolbox

    FEATool Multiphysics - FEA Toolbox

    FEATool Multiphysics is an easy to use FEA and CFD Simulation Toolbox

    FEATool Multiphysics (https://www.featool.com) is a fully integrated, flexible and easy to use physics and Finite Element Analysis (FEA) simulation toolbox. Developed with ease of use in mind, everyone is able to set up and perform complex multiphysics simulations in a simple GUI without learning coding, programming, or scripting. In addition to built-in FEM and PDE solvers, FEATool features full integration with the high performance SU2, OpenFOAM, and FEniCS physics solvers, functioning as an easy-to-use GUI for OpenFOAM (https://www.featool.com/Easy-to-Use-OpenFOAM-GUI). With built-in CAD and pre-processing, automatic mesh generation, solvers, and postprocessing, FEATool enables large scale dynamical models and physics simulations to be set up and solved easily and quickly directly in the integrated MATLAB GUI. Multiphysics and multi-simulation also allows for fully coupled fluid flow, heat transfer, chemical transport, electromagnetics, and fluid-structure interaction simulation.
    Downloads: 3 This Week
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  • 18
    The Orientation Library is a collection of routines for rotation/orientation manipulation. It ranges from general tools to others for crystal orientations. It is written in C and is well-documented. An interactive program enables to run the routines.
    Downloads: 3 This Week
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  • 19
    CFDTool - CFD & OpenFOAM GUI Toolbox

    CFDTool - CFD & OpenFOAM GUI Toolbox

    CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox

    CFDTool - "CFD Simulation Made Easy" CFDTool is a fluid dynamics toolbox for modeling and simulation of flows with coupled heat transfer. Based on FEATool Multiphysics (https://www.featool.com), CFDTool is specifically designed to make advanced fluid mechanics and heat transfer simulations both easy and enjoyable. - Completely stand-alone and cross-platform self-contained toolbox - Optionally use as MATLAB Add-On toolbox - Fully integrated and easy to use MATLAB GUI - Modeling and simulation in 1D, 2D, 3D, and axisymmetric/swirl/cylindrical coordinate systems - Seamless OpenFOAM GUI and SU2 CFD solver integrations (https://www.featool.com/Easy-to-Use-OpenFOAM-GUI) - Built-in geometry and CAD tools - Automatic mesh and grid generation - Pre-defined equations and boundary conditions for: + Incompressible viscous fluid flows (Navier-Stokes equations) + Compressible, supersonic, trans-sonic, and turbulent flows + Heat conduction with conjugate heat transfer
    Downloads: 5 This Week
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  • 20
    Free_Balistic

    Free_Balistic

    Input physical measures, calculate and show ballistic curve chart.

    This application is intended to give abilities of calculating physical measures and draw charts, related to the aspect of the movement of sphere - shaped projectiles, ejected to reach some range. With the help of FreeBalistic you can fast calculate such measures as: height of bullet after specified time, height for given range, max height of bullet, range after given time, range to get max height, range to the end of move, time to get given range, time to get max height, time to get end of move. The app is currently in the middle state of development, and will recive at least one update. The curent target of this project is to achieve modification of chart display, that allows to show all scope of calculated values. In opposite to similar projects, this one is oriented to consider additional physical conditions, that can affect on the sphere-body movement, especially air resistance and throw angle For more info visit: www.freebasic.net/forum/viewtopic.php?f=8&t=27484
    Downloads: 8 This Week
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  • 21
    Knitter produces a 3-dimensional model of a knitting pattern. It supports KnitML, as well as a native language similar to that of traditional knitting patterns.
    Downloads: 4 This Week
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  • 22
    IF97

    IF97

    Water & steam properties Java library

    Steam tables for industrial use according to the international standard for the properties of water and steam, the IAPWS-IF97 formulation and the international standards for transport and other properties. Hummeling Engineering BV develops engineering software in the fields of thermodynamics, mechanics, hydrodynamics, and digital signal processing.
    Downloads: 6 This Week
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  • 23
    PDSTRIP is a hydrodynamic strip code for seakeeping. It computes ship motions for monohulls including sailing boats. PDSTRIP has been abandoned by its initiators, who do not wish to be contacted with use questions. The position of maintainer is vacant.
    Downloads: 5 This Week
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  • 24
    QVM is a quaternion, vector, and matrix class set in C++ for 3D kinematics.
    Downloads: 5 This Week
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  • 25
    This program allows you to create a transmission hologram using just a computer, a laser-printer, and an overhead transparency. This hologram will behave like one created using a laser and can be projected or viewed with a point source.
    Downloads: 2 This Week
    Last Update:
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