Elmer is an open-source computational tool for multi-physics problems. It has been developed in collaboration with Finnish universities, research laboratories and industry. - Elmer includes physical models of fluid dynamics, structural mechanics, electromagnetics and heat transfer. These are described by partial differential equations which Elmer solves by the Finite Element Method (FEM). - Elmer comprises of several different parts: The geometry, boundary conditions and physical models are defined in ElmerFront. The resulting problem definition is solved by ElmerSolver. Finally the results are visualized by ElmerPost. Additionally a utility ElmerGrid may be used for simple mesh manipulation. - The different parts of Elmer software may also be used independently. The strongest of the components is ElmerSolver which includes many sophisticated features. For pre- and postprosessing the users may find also other alternatives.

Code_Aster propose, bien au delà des fonctionnalités standard d'un code de calcul thermo-mécanique, toute une panoplie de méthodes d'analyse et de modélisations multiphysiques : de l'analyse sismique aux milieux poreux en passant par l'acoustique, la fatigue, la dynamique stochastique… Ses modélisations, ses algorithmes et ses solveurs ont gagné en robustesse et en complétude (1000000 lignes de codes, 200 opérateurs). Résolument ouvert, il est chaîné, couplé et encapsulé de mille façons. Bref, l'utilisateur n'a que l'embarras du choix.

Cast3M est un code de calcul pour l'analyse de structures par la méthode des éléments finis. Ce code a été développé par le Département Mécanique et Technologie (DMT) du Commissariat français à l'Energie Atomique (CEA).
Le développement de Cast3M entre dans le cadre d'une activité de recherche dans le domaine de la mécanique dont le but est de définir un instrument de haut niveau, pouvant servir de support pour la conception, le dimensionnement et l'analyse de structures et de composants, dans le domaine du nucléaire comme dans le secteur industriel classique.
Dans cette optique, Cast3M intègre non seulement les processus de calculs proprement dits mais également les fonctions de construction du modèle (pré-processeur) et les fonctions de traitement des résultats (post-traitement). Cast3M est un programme que l'utilisateur peut adapter à ses besoins pour résoudre ses propres problèmes.

TYPHON is an open source project which aims to offer a development platform for many computational methods for gas dynamics. It is structured as a multi-solver platform where it could be easily added a new solver. For now, it provides a finite volume solver for compressible inviscid equations and a finite volume solver for heat transfer.

NGSolve is a general purpose 3D finite element solver. Version 1.x supports scalar (heat flow), elasticity and magnetic field problems. The package provides C++ source code such that more advanced problem solvers can be built around it. NGSolve performs adaptive mesh refinement, the matrix equations are solved by optimal order multigrid methods.

Channelflow is a software system for numerical analysis of the incompressible Navier-Stokes flow in channel geometries, written in C++. The core engine of Channelflow is a spectral CFD1) algorithm for integrating the Navier-Stokes equations. This engine drives a number of higher-level algorithms that (for example) compute equilibria, traveling waves, and periodic orbits of Navier-Stokes. Channelflow provides these algorithms in an easy-to-use, flexible, and intelligible form by using relatively modern software design. Channelflow consists of a software library for rapid, high-level development of spectral CFD codes and a set of predefined executable programs that perform common tasks involving CFD. Channelflow is customized for Fourier x Chebyshev x Fourier expansions appropriate for rectangular geometries with periodic boundary conditions in two directions and rigid walls in the remaining direction.

GETM is a 3D numerical model simulating the most important hydrodynamic and thermodynamic processes in natural waters. The model is general in the sense that it can be applied to various systems, scales and specifications. The model includes for example flooding and drying of tidal flats, flexible vertical and horizontal coordinate systems, different turbulence models integrated from GOTM, and is a Public Domain model published under GNU Public Licence.

CalculiX is a package designed to solve field problems. The method used is the finite element method. With CalculiX Finite Element Models can be build, calculated and post-processed. The pre- and post-processor is an interactive 3D-tool using the OpenGL API. The solver is able to do linear and non-linear calculations. Static, dynamic and thermal solutions are available. Both programs can be used independently. Because the solver makes use of the abaqus input format it is possible to use commercial pre-processors as well. In turn the pre-processor is able to write mesh related data for nastran, abaqus, ansys, code-aster and for the free-cfd codes duns, ISAAC and OpenFOAM. A vda CAD interface is available. The program is designed to run on Unix platforms like Linux and Irix computers but also on MS-Windows. The CalculiX package was developed by a team of enthusiasts in their raw spare time. They are employees of MTU Munich, an Aero Engine manufacturer in Germany which granted the publication.

GOTM is the abbreviation for 'General Ocean Turbulence Model'. It is a one-dimensional water column model for the most important hydrodynamic and thermodynamic processes related to vertical mixing in natural waters. In addition, it has been designed such that it can easily be coupled to 3-D circulation models, and used as a module for the computation of vertical turbulent mixing. The core of the model computes solutions for the one-dimensional versions of the transport equations of momentum, salt and heat. The key component in solving these equations is the model for the turbulent fluxes of these quantities. The strength of GOTM is the vast number of well-tested turbulence models that have been implemented in the code. These models span the range from simple prescribed expressions for the turbulent diffusivities up to complex Reynolds-stress models with several differential transport equations to solve. Even though, evidently, not all turbulence models published in oceanography could be implemented, at least one member of every relevant model family can be found in GOTM: empirical models, energy models, two-equation models, Explicit Algebraic Stress Models (EASM), and K-profile parameterisations (KPP).

OpenSees a software framework for developing applications to simulate the performance of structural and geotechnical systems subjected to earthquakes.
The goal of the OpenSees development is to improve the modeling and computational simulation in earthquake engineering through open-souce development.

Bidirectional Reflectance CodesThis webpage provides access to two collections of FORTRAN codes. The first one can be used to compute the (scalar) bidirectional reflectance of a semi-infinite homogeneous slab composed of arbitrarily shaped, randomly oriented particles based on a rigorous numerical solution of the radiative transfer equation. The second one can be used to compute the Stokes reflection matrix of a rough interface separating two homogeneous half-spaces with different refractive indices (e.g., a rough ocean surface).

EMAP (ElectroMagnetic Analysis Program) is a family of three-dimensional finite element modeling codes that can be used to analyze simple 3-dimensional geometries. The EMAP codes are relatively easy to learn to use and are distributed in source code form. The EMAP codes are not intended to compete with commercial finite element modeling codes. They do not have a sophisticated mesh generator, graphical output, or unlimited technical support. Their primary strengths are ease-of-use, modest resource requirements, and accurate modeling of simple three-dimensional configurations over a wide range of frequencies.