The Open Forcefield Toolkit provides implementations of the SMIRNOFF format, parameterization engine, and other tools. Documentation available at http://open-forcefield-toolkit.readthedocs.io
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Updated
Jul 27, 2026 - Python
The Open Forcefield Toolkit provides implementations of the SMIRNOFF format, parameterization engine, and other tools. Documentation available at http://open-forcefield-toolkit.readthedocs.io
A project (and object) for storing, manipulating, and converting molecular mechanics data.
Parameter/topology editor and molecular simulator
CHARMM and AMBER forcefields for OpenMM (with small molecule support)
Automated tools for the generation of bespoke SMIRNOFF format parameters for individual molecules.
Force fields produced by the Open Force Field Initiative
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