Fem GitHub Repositories (2026) · Open Source Tools

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

Multiphysics Object Oriented Simulation Environment: A robust, modern, extendable, finite element/finite volume framework that excels at creating complex multiphysics simulations.

Lightweight, general, scalable C++ library for finite element methods

Netgen/NGSolve is a high performance multiphysics finite element software. It is widely used to analyze models from solid mechanics, fluid dynamics and electromagnetics. Due to its flexible Python interface new physical equations and solution algorithms can be implemented easily.

One open-source modeler for structures, heat and fluids, built from scratch in pure Rust: parametric part in, verified results out. Automatic all-hex and tet meshing, our own nonlinear implicit and explicit FEA, heat transfer and lattice Boltzmann CFD — every result checked against theory. For engineers and AI agents alike. Free, forever.

Full featured RF circuit + electromagnetic simulator. DC, S-parameters, harmonic balance, loadpull, envelope. Also supports 2D and 3D layout and design and electromagnetic MoM, FEM, FDTD + thermal FEM.

Open finite element infrastructure for nonlinear computational mechanics.

GPU accelerated differentiable finite elements for solid mechanics with PyTorch

DO NOT USE THIS REPO! Migrated to https://gitlab.opengeosys.org/ogs/ogs!

:gem: Feel++: Finite Element Embedded Language and Library in C++