COMSOL Multiphysics is desktop simulation software for designs, devices, and processes in engineering, manufacturing, and scientific research.
Alternatives to SimFlow
SimFlow handles a complete desktop CFD workflow, from mesh generation through post-processing, with authoring tools, 3D visuals, offline access, and data export. Its full simulation engine comes with every plan, and it runs on Windows, Linux, and macOS, including Apple Silicon. Simulations stay on your hardware, while jobs can use local clusters, remote servers, or cloud resources. The free plan requires no signup, card, or time limit, but allows 200,000 mesh nodes and one…
FeenoX is free, open-source computational engineering software for solving mathematical and engineering problems on one or more computers.
myPhysicsLab is a free, open-source collection of interactive physics simulations and JavaScript tools for building animated models.
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OpenFOAM
OpenFOAM is a free, open-source computational fluid dynamics toolbox for simulating fluid flow, heat transfer, and related physical processes.
Free planLinuxmacOSSelf-hostedWindows7.3Free plan - 5
MPTRAC
MPTRAC is a free Lagrangian particle dispersion model for studying atmospheric transport in the free troposphere and stratosphere.
Free planWebLinuxSelf-hosted7.2Free plan - 6
FEST-3D
FEST-3D is a free, open-source computational fluid dynamics solver for aerodynamic Navier–Stokes problems on structured grids.
Free planLinuxmacOS7.2Free plan - 7
OpenSim
OpenSim is a free, open-source platform for modeling and simulating movement and interaction among humans, animals, robots, and their environment.
Free planAPILinuxmacOSWindows7.1Free plan - 8

FEATool Multiphysics
FEATool Multiphysics is desktop engineering software for modeling and solving physics problems.
LinuxmacOSWindows7.1 - 9
Physics Classroom Physics Interactives
Physics Classroom Physics Interactives is an online collection of about 100 physics simulations, practice activities, and game-like challenges.
AndroidiOSWeb7.1 - 10
DynamicalSystems.jl
DynamicalSystems.jl is a free, open-source Julia library for nonlinear dynamics and nonlinear time-series analysis.
Free planLinuxmacOSWindows7.1Free plan - 11
Algodoo
Algodoo is 2D simulation software for creating interactive scenes, exploring physics, building inventions, designing games, and experimenting in science classes.
Free planiOSmacOSWindows7.1Free plan - 12
PyAutoLens
Free planLinuxmacOSWindows7.1Free plan - 13
Physion
Free planWeb7.1From $6 a month - 14

SimScale
SimScale is a web-based cloud platform for engineering simulation across structural mechanics, fluid dynamics, thermodynamics, electromagnetics, and multiphysics.
Web7.0 - 15
Open Source Physics
AndroidiOSWebLinux7.0 - 16
GNU FisicaLab
GNU FisicaLab is a free desktop learning application that solves physics problems while handling the mathematical details.
Free planLinuxWindows7.0Free plan - 17
FDTDX
FDTDX is a free, open-source Python package for simulating and designing three-dimensional photonic nanostructures with the finite-difference time-domain method.
Free planLinuxSelf-hosted7.0Free plan - 18
Ansys Fluent
Ansys Fluent is computational fluid dynamics software for simulating fluid-flow phenomena with advanced numerics.
LinuxSelf-hostedWindows6.9 - 19
ngspice
ngspice is a free, open-source simulator for electric and electronic circuits.
Free planLinuxmacOSSelf-hostedWindows6.9Free plan - 20
Xcos
Free planLinuxmacOSWindows6.9Free plan - 21
SimEvents
SimEvents is a desktop product for modeling message-based communication and other event-driven processes.
LinuxmacOSWindows6.9 - 22

ASCEND
ASCEND is free desktop software for engineers and scientists who need to solve systems of equations.
Free planLinuxmacOSWindows6.9Free plan - 23
libCEED
libCEED is a free BSD-2-Clause library for matrix-free operator representation, providing runtime selection of implementations for CPUs and GPUs.
Free planAPILinuxSelf-hosted6.9Free plan - 24
LISE++
LISE++ is free desktop software for Linux, macOS, and Windows that calculates fragment transmission and yields in a spectrometer.
Free planLinuxmacOSWindows6.8Free plan - 25
Interactive Physics
macOSWindows6.8 - 26
Basix
Free planLinuxmacOS6.8Free plan - 27
Step
Step is a free Linux desktop application for exploring physical systems through interactive simulations.
Free planLinux6.7Free plan - 28
SIMION
LinuxWindows6.7 - 29
PhysSandbox
Free planWeb6.7Free plan - 30
The Physics Aviary
Free planWeb6.7Free plan
