The "Simulation and Modelling" category is quite broad at the moment. There is lots of overlap with the "Geophysics" category: e.g. emsig, Fatiando, ResIPy, SimPEG, ... would all fit under "Geophysics". Would it help with discoverability of packages to try to move project names out of "Simulation and Modelling" which might be a bit of a catch-all at the moment?