The Stanford University Unstructured (SU2) suite is an open-source
collection of software tools written in C++ for performing Partial
Differential Equation (PDE) analysis and solving PDE-constrained
optimization problems. The toolset is designed with computational
fluid dynamics and aerodynamic shape optimization in mind, but it is
extensible (and has been extended) to treat arbitrary sets of
governing equations such as electrodynamics, chemically reacting
flows, and many others.