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
CHARMM and AMBER forcefields for OpenMM (with small molecule support)
Parameter/topology editor and molecular simulator
Automated tools for the generation of bespoke SMIRNOFF format parameters for individual molecules.
OFFICIAL: AnteChamber PYthon Parser interfacE
An automated framework for generating optimized partial charges for molecules
OpenFF NAGL
Interface for AutoDock, molecule parameterization
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