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@openforcefield

Open Force Field Initiative

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

To get started using OpenFF tools and force fields, go to https://docs.openforcefield.org

For information on our force field releases, go to https://openforcefield.org/force-fields/force-fields/

For information about the Open Force Field Consortium and Initiative, see https://openforcefield.org

For guidance on how to cite our software and force fields, see https://openforcefield.org/science/how-to-cite/

For general questions and high-level discussions, please chime in at https://github.com/orgs/openforcefield/discussions

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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 418 109

  2. openff-forcefields openff-forcefields Public

    Force fields produced by the Open Force Field Initiative

    Python 195 29

  3. openff-bespokefit openff-bespokefit Public

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

    Python 86 16

  4. openff-interchange openff-interchange Public

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

    Python 97 32

  5. openff-evaluator openff-evaluator Public

    A physical property evaluation toolkit from the Open Forcefield Consortium.

    Python 61 22

  6. openff-recharge openff-recharge Public

    An automated framework for generating optimized partial charges for molecules

    Python 40 9

Repositories

Showing 10 of 98 repositories
  • 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 5 4 1 Updated Nov 4, 2026
  • openff-interchange Public

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

    openforcefield/openff-interchange's past year of commit activity
    Python 97 MIT 32 101 (8 issues need help) 6 Updated Nov 4, 2026
  • openff-units Public

    A common units module for the OpenFF software stack

    openforcefield/openff-units's past year of commit activity
    Python 10 MIT 4 8 4 Updated Nov 3, 2026
  • openff-forcefields Public

    Force fields produced by the Open Force Field Initiative

    openforcefield/openff-forcefields's past year of commit activity
    Python 195 CC-BY-4.0 29 10 1 Updated Nov 3, 2026
  • openff-recharge Public

    An automated framework for generating optimized partial charges for molecules

    openforcefield/openff-recharge's past year of commit activity
    Python 40 MIT 9 9 1 Updated Nov 3, 2026
  • openff-nagl Public

    OpenFF NAGL

    openforcefield/openff-nagl's past year of commit activity
    Python 23 MIT 9 23 7 Updated Nov 3, 2026
  • openff-fragmenter Public

    Fragment molecules for quantum mechanics torsion scans

    openforcefield/openff-fragmenter's past year of commit activity
    Python 49 MIT 16 7 0 Updated Nov 3, 2026
  • openff-qcsubmit Public

    Automated tools for submitting molecules to QCFractal

    openforcefield/openff-qcsubmit's past year of commit activity
    Python 27 MIT 8 47 6 Updated Nov 3, 2026
  • openff-pablo Public

    New implementation of `Topology.from_pdb`

    openforcefield/openff-pablo's past year of commit activity
    Python 12 MIT 2 36 9 Updated Nov 3, 2026
  • kubecustom Public

    Kubernetes assessment and combined control functions to handle multiple deployments.

    openforcefield/kubecustom's past year of commit activity
    Python 0 MIT 0 0 1 Updated Nov 3, 2026