• Setting up initial conditions for neutrino simulations: see this page.
• Various tools for topological data analysis: see here.
• Cosmological simulations with massive neutrinos: I have implemented various neutrino models in the cosmological hydrodynamics code SWIFT (repository here).

Other noteworthy projects:

mitos – Cosmological initial condition generator for higher order (nSPT) relativistic initial conditions, as well as a wide ranging array of analysis tools https://github.com/wullm/mitos

firebolt – Dedicated Boltzmann solver for high resolution neutrino perturbations: https://github.com/wullm/firebolt

dynhung – An R-package for solving the assignment problem with changing cost matrix. The program uses a dynamic implementation of the Hungarian algorithm https://github.com/wullm/dynhung.