Lammps is a classical molecular dynamics code, and an acronym for large-scale atomic/molecular massively parallel simulator.

lammps has potentials for soft materials (biomolecules, polymers) and solid-state materials (metals, semiconductors) and coarse-grained or mesoscopic systems. it can be used to model atoms or, more generically, as a parallel particle simulator at the atomic, meso, or continuum scale.

lammps runs on single processors or in parallel using message-passing techniques and a spatial-decomposition of the simulation domain. the code is designed to be easy to modify or extend with new functionality.

the package contains documentation and examples.