I enjoy developing numerical software, such as finite-element and finite-volume solvers. Some examples:

-SFEM: A parallel C++ framework for the numerical solution of PDEs on unstructured meshes

-WELDSIM: Thermal simulation of arc welding with AMR

-mSense: A Python framework for Multidisciplinary Analysis and Optimization

-ArgParse: Lightweight parser for command-line arguments in modern C++