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

OpenFOAM is the free, open source CFD software developed primarily by OpenCFD Ltd.

NetCDF is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.

The GNU Scientific Library (GSL) is a numerical library for C and C++ programmers.

FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST).

The Open MPI Project is an open source Message Passing Interface implementation that is developed and maintained by a consortium of academic, research, and industry partners.