Scientific software: My research is a lot about developing or using codes. Programming languages that we use in my group are C, C++, Fortran, Python, Cuda...
I am using the following codes:
ramses: this is the main code I am using for my research. It is an Adaptive Mesh Refinement hydro code for self-gravitating astrophysical flows.
music: this is a cosmological initial conditions generator, written by Oliver Hahn. It can be used to generate large periodic boxes, but also complex zoom-in simulations.
pkdgrav3: this is a tree code written by Joachim Stadel and Doug Potter, with a fast multipole gravity solver that can run up to 2 Trillion particles on the Swiss supercomputer Piz Daint and 8 Trillion particles on the American supercomputer Titan.