The Free Energy and Advanced Sampling Simulation Toolkit (FEASST) is a free, open-source, public domain software to conduct molecular- and particle-based simulations with Monte Carlo methods.
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Website: https://pages.nist.gov/feasst/
Website DOI: https://doi.org/10.18434/M3S095
Manuscript (v0.25.1): https://doi.org/10.1063/5.0224283
Code repository: https://github.com/usnistgov/feasst
Discussion list: https://groups.google.com/a/list.nist.gov/d/forum/feasst