CalculiX is a finite element based package designed to solve field problems.

Code_Saturne is a public domain CFD code.

Delft3D is a world leading 3D modeling suite to investigate hydrodynamics, sediment transport and morphology and water quality for fluvial, estuarine and coastal environments.

FEniCS is a popular open-source (LGPLv3) computing platform for solving partial differential equations (PDEs).

Hyperworks is a GUI for Pre/Post processing for engineering applications.

The INS2D code solves the incompressible Navier-Stokes equations in two-dimensional generalized coordinates for both steady-state and time varying flow.

The INS3D code solves the incompressible Naiver-Stokes equations in three-dimensional generalized coordinates for both steady-state and time varying flow.

OpenFOAM is primarily intended as a C++ library for building CFD solver applications and utilities.