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@openforcefield

Open Force Field Initiative

An open source, open science, and open data approach to better force fields

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  1. openff-toolkit openff-toolkit Public

    The Open Forcefield Toolkit provides implementations of the SMIRNOFF format, parameterization engine, and other tools. Documentation available at http://open-forcefield-toolkit.readthedocs.io

    Python 381 101

  2. openff-forcefields openff-forcefields Public

    Force fields produced by the Open Force Field Initiative

    Python 176 26

  3. openff-bespokefit openff-bespokefit Public

    Automated tools for the generation of bespoke SMIRNOFF format parameters for individual molecules.

    Python 72 12

  4. openff-interchange openff-interchange Public

    A project (and object) for storing, manipulating, and converting molecular mechanics data.

    Python 88 24

  5. openff-evaluator openff-evaluator Public

    A physical property evaluation toolkit from the Open Forcefield Consortium.

    Python 58 21

  6. openff-recharge openff-recharge Public

    An automated framework for generating optimized partial charges for molecules

    Python 39 7

Repositories

Showing 10 of 93 repositories
  • dimsim Public

    Distributed simulation

    openforcefield/dimsim’s past year of commit activity
    Python 1 MIT 0 25 3 Updated Feb 10, 2026
  • status Public

    Assorted maintenance tools within the Open Force Field software stack

    openforcefield/status’s past year of commit activity
    Shell 9 MIT 3 8 1 Updated Feb 10, 2026
  • openff-utilities Public

    A collection of miscellaneous utility functions used throughout the OpenFF stack

    openforcefield/openff-utilities’s past year of commit activity
    Python 1 MIT 4 3 0 Updated Feb 10, 2026
  • smirnoff99Frosst Public

    A general small molecule force field descended from AMBER99 and parm@Frosst, available in the SMIRNOFF format

    openforcefield/smirnoff99Frosst’s past year of commit activity
    Python 31 CC-BY-4.0 8 16 0 Updated Feb 10, 2026
  • alchemical-benchmark-resources Public

    Resource for OpenFF staff to Run Alchemical Calculations for Force Field Benchmarking

    openforcefield/alchemical-benchmark-resources’s past year of commit activity
    0 MIT 0 0 0 Updated Feb 10, 2026
  • yammbs Public

    Internal tool for benchmarking force fields

    openforcefield/yammbs’s past year of commit activity
    Jupyter Notebook 6 MIT 2 21 7 Updated Feb 10, 2026
  • openff-qcsubmit Public

    Automated tools for submitting molecules to QCFractal

    openforcefield/openff-qcsubmit’s past year of commit activity
    Python 27 MIT 6 45 6 Updated Feb 10, 2026
  • openff-evaluator Public

    A physical property evaluation toolkit from the Open Forcefield Consortium.

    openforcefield/openff-evaluator’s past year of commit activity
    Python 58 MIT 21 59 (1 issue needs help) 10 Updated Feb 10, 2026
  • openff-docs Public

    Documentation for the Open Force Field ecosystem

    openforcefield/openff-docs’s past year of commit activity
    Jupyter Notebook 0 MIT 2 16 2 Updated Feb 10, 2026
  • openff-nagl Public

    OpenFF NAGL

    openforcefield/openff-nagl’s past year of commit activity
    Python 19 MIT 4 21 8 Updated Feb 10, 2026

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