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

Code_Saturne is a public domain CFD code.

DAMASK (Dusseldorf Advanced Material Simulation Kit) is a unified multi-physics crystal plasticity simulation package.

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

Environmental Fluid Dynamics Code (EFDC) is a multifunctional surface water modeling engine that includes hydrodynamic, sediment-contaminant, and eutrophication components designed to simulate aquatic systems in one, two, and three dimensions.

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.