The FEniCS Project is a collection of free and open-source software components with the common goal to enable automated solution of differential equations.

The components provide scientific computing tools for working with computational meshes, finite-element variational formulations of ordinary and partial differential equations, and numerical linear algebra.

The core components are[4] DOLFIN, the computational high-performance C++ backend of FEniCS, functions as the main problem-solving environment (in both C++ and Python) and user interface.

Its functionality integrates the other FEniCS components and handles communication with external libraries such as PETSc, Trilinos and Eigen for numerical linear algebra, ParMETIS and SCOTCH for mesh partitioning, and MPI and OpenMP for distributed computing.

[8] DOLFINx supports many new features not available in the old DOLFIN interface, including: