pyOptSparse is an object-oriented framework for formulating and solving nonlinear constrained optimization problems in an efficient, reusable, and portable manner.

DAFoam: Discrete Adjoint with OpenFOAM for High-fidelity Multidisciplinary Design Optimization

pyGeo provides geometric design variables and constraints suitable for gradient-based optimization.

preFoil facilitates rapid airfoil generation and manipulation.

OpenConcept: A toolkit for conceptual MDAO of aircraft with unconventional propulsion architectures

pyHyp generates volume meshes from surface meshes using hyperbolic marching.