Simulation

Mathematics

mathics: An open-source Mathematica. This repository contains the Python modules for WL Built-in functions, variables, core primitives, e.g. Symbol, a parser to create Expressions, and an evaluator to execute them.
SageMath: an open source math tool to instead matlab
Software for Math Research

CS

Network

exata

inet
parallel simulation: a paper and guide

Physical

ansys
crosslight
comsol

fdtd

fdtdxx
meep

pcb

kicad