Qt is a powerful cross-platform application development framework, for use primarily (but not exclusively) in C++. It's great for GUI applications, but can be used for many other things as well. If ...
LAMMPS-GUI used to "live" in the "tools/lammps-gui" folder of the LAMMPS source distribution and the LAMMPS git repository. This made it easy to build LAMMPS-GUI together with LAMMPS. However, ...