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Computational chemistry and materials software

Search names, methods and keywords, filter by purpose, or browse A–Z. Names retain their official spelling; consult the linked version’s official documentation for licensing and available features.

57 packages

ABACUS

Periodic electronic structure

DFT software offering plane-wave and numerical atomic-orbital bases, geometry optimization, molecular dynamics, and interfaces to machine-learning-assisted materials methods.

Open source under LGPL-3.0; check separate datasets and dependencies.

Introduction and official sources →

ABINIT

Periodic electronic structure

Electronic-structure suite for periodic systems, with plane-wave ground-state calculations, density-functional perturbation theory, and many-body excited-state methods.

Open-source distribution; consult the official release licence and external-library terms.

Introduction and official sources →

ADF

Molecular quantum chemistry

The molecular DFT engine in AMS uses Slater-type orbitals and offers relativistic calculations, spectroscopy and detailed chemical-bonding analysis.

An SCM-licensed AMS engine; access depends on the purchased or trial module entitlement.

Introduction and official sources →

AiiDA

Workflow infrastructure

Python workflow infrastructure that submits calculations, records input–output provenance, and organizes reproducible computational research across simulation codes.

MIT-licensed core; external engines and plugins may have other licences.

Introduction and official sources →

Amsterdam Modeling Suite

Workflow infrastructure

An integrated modeling suite whose AMS Driver coordinates geometry, dynamics and property workflows across electronic-structure and force-field engines.

SCM commercial licensing; confirm the engines, modules and computing resources covered by the entitlement.

Introduction and official sources →

ASE

Workflow infrastructure

Atomic Simulation Environment supplies Python objects and algorithms for building structures, attaching calculators, optimizing geometries, and analyzing atomistic simulations.

GNU LGPL; independently obtain permission for any connected proprietary engine.

Introduction and official sources →

Avogadro

Visualization and editing

An interactive molecular editor and visualization application for building geometries, preparing calculation inputs, and inspecting structures and electronic-structure outputs.

Avogadro 2 is free and open source under BSD 3-Clause; check plugin terms.

Introduction and official sources →

BAGEL

Molecular quantum chemistry

A parallel electronic-structure library with multiconfigurational wavefunctions, perturbation theory, nuclear gradients and relativistic methods.

Distributed under the GNU GPL; inspect the selected source release and dependency licences.

Introduction and official sources →

BAND

Periodic electronic structure

The atomic-orbital periodic DFT engine in AMS supports bulk, surfaces and wires, with all-electron and relativistic treatments and chemical analysis.

Commercial SCM engine; verify BAND coverage in the AMS licence.

Introduction and official sources →

BigDFT

Periodic electronic structure

A wavelet-basis DFT program with conventional and linear-scaling approaches, flexible boundary conditions and Python-driven workflows.

Open-source software; consult the licence for the selected BigDFT suite components and dependencies.

Introduction and official sources →

CASINO

Monte Carlo

A quantum Monte Carlo program for correlated electronic-structure calculations in atoms, molecules and extended systems using stochastic wavefunction methods.

Obtain via the official request form; standard and developer distributions differ. Confirm current use and redistribution terms.

Introduction and official sources →

CASTEP

Periodic electronic structure

Plane-wave DFT software for periodic materials, combining structural and electronic calculations with vibrational and spectroscopic properties.

Cost-free worldwide academic research-group source licences are subject to approval and terms; commercial access is through BIOVIA Materials Studio.

Introduction and official sources →

CFOUR

Molecular quantum chemistry

A high-level molecular quantum-chemistry suite centered on coupled-cluster methods, analytic derivatives and accurate spectroscopic properties.

No charge for non-commercial use after signing a licence agreement; this is not an unrestricted open-source grant.

Introduction and official sources →

COLUMBUS

Molecular quantum chemistry

A multireference electronic-structure suite offering MCSCF, MR-CISD, MR-ACPF and MR-AQCC, with gradients and selected nonadiabatic couplings.

Open source under LGPL; official source and binary releases are provided through GitLab.

Introduction and official sources →

CONQUEST

Periodic electronic structure

A large-scale DFT code supporting diagonalization and linear-scaling calculations, with adjustable precision and parallel execution.

Open source under the MIT licence.

Introduction and official sources →

CP2K

Periodic electronic structure

Atomistic simulation package combining Gaussian and plane-wave representations, with DFT, molecular dynamics, classical force fields and multiscale modeling.

Freely available under the GPL; the project does not promise warranty or direct support.

Introduction and official sources →

CREST

Workflow infrastructure

A conformer and rotamer ensemble sampling tool originating as an xTB driver, with workflows for conformational exploration, thermochemistry and solvation.

GNU LGPL distribution; connected computational engines retain their own licence terms.

Introduction and official sources →

CRYSTAL

Periodic electronic structure

A solid-state electronic-structure package using localized Gaussian basis functions for Hartree–Fock, DFT and hybrid-functional calculations.

Paid proprietary licensing through CRYSTAL Solutions; platform and massively parallel extensions are licence-dependent.

Introduction and official sources →

Dalton

Molecular quantum chemistry

A molecular quantum-chemistry program emphasizing properties and response theory, with HF, DFT, multiconfigurational and correlated methods.

Open source under LGPL; check the licence bundled with the selected release and external libraries.

Introduction and official sources →

DeePMD-kit

Machine-learning potentials

Trains and deploys Deep Potential interatomic models from reference data, connecting machine-learning energy and force predictions to atomistic simulation engines.

LGPL-3.0-or-later code; pretrained model and training-data terms need separate review.

Introduction and official sources →

DFTB+

Tight binding and semiempirical

A quantum-atomistic engine using approximate density-functional tight-binding methods, available as a standalone program or embeddable library.

GNU LGPL software; parameter sets may carry separate licences and citation requirements.

Introduction and official sources →

DIRAC

Molecular quantum chemistry

Relativistic atomic and molecular electronic-structure software for treating heavy-element effects and molecular properties with two- and four-component methods.

Open source under LGPL-2.1-only since DIRAC22; consult bundled component terms.

Introduction and official sources →

Elk

Periodic electronic structure

An all-electron full-potential LAPW code designed for electronic-structure calculations and extensible solid-state method development.

Open source under GPL-3.0-or-later.

Introduction and official sources →

exciting

Periodic electronic structure

A full-potential all-electron LAPW package with a particular focus on electronic excitations and theoretical spectroscopy of materials.

Obtain the code from the official project and check the selected release licence and bundled-library terms.

Introduction and official sources →

FHI-aims

Periodic electronic structure

All-electron electronic-structure software using numeric atom-centered orbitals for molecules, surfaces and solids, including DFT and many-body methods.

Licences for academia and industry are supplied by nonprofit MS1P; confirm the applicable access and fee terms.

Introduction and official sources →

FLEUR

Periodic electronic structure

An all-electron FLAPW materials code with tools for electronic bands, thin films, noncollinear magnetism and spin–orbit physics.

Open source under the MIT licence; check companion-program terms separately.

Introduction and official sources →

GAMESS (US)

Molecular quantum chemistry

The Iowa State GAMESS program provides molecular electronic-structure methods from Hartree–Fock and DFT to multiconfigurational and correlated wavefunctions.

No-cost registration-based licence for academic and industrial users, with redistribution restrictions; source availability is not open-source licensing.

Introduction and official sources →

Gaussian

Molecular quantum chemistry

A licensed electronic-structure package used for molecular energies, structures, vibrational calculations and related quantum-chemical properties.

Proprietary paid licensing; source access does not mean open source. GaussView and Linda may require separate licences.

Introduction and official sources →

GPAW

Periodic electronic structure

A Python-oriented PAW electronic-structure code with plane-wave, real-space finite-difference and atomic-orbital representations, integrated with ASE.

GPL version 3 or later; PAW datasets and dependencies should also be checked.

Introduction and official sources →

GROMACS

Molecular dynamics

A molecular simulation toolkit for classical dynamics, with tools for system preparation, trajectories, analysis and free-energy workflows.

Open source under LGPL-2.1; independently check force-field and auxiliary-tool terms.

Introduction and official sources →

JDFTx

Periodic electronic structure

A plane-wave DFT code combining electronic structure with fluid and continuum-solvation models, including fixed-potential electrochemical calculations.

Open source under GPL version 3 or later.

Introduction and official sources →

LAMMPS

Molecular dynamics

A modular particle-simulation engine with a broad range of classical interaction models, materials methods and optional packages for large-scale simulations.

GPL open source; optional dependencies and potential files can have additional terms.

Introduction and official sources →

MACE

Machine-learning potentials

An equivariant machine-learning interatomic-potential framework for training models and using pretrained molecular or materials force fields.

MIT-licensed code; model weights have separate licences, including MIT and ASL variants. Check each model.

Introduction and official sources →

Molpro

Molecular quantum chemistry

A molecular electronic-structure package emphasizing correlated wavefunction methods, including coupled-cluster and multireference approaches.

Licence tokens and paid licence options are supplied by Molpro; trial access is available subject to current terms.

Introduction and official sources →

MOPAC (OpenMOPAC)

Tight binding and semiempirical

The modern open-source continuation of MOPAC provides semiempirical molecular-orbital calculations for molecules and materials.

Modern OpenMOPAC is Apache-2.0 licensed and maintained by MolSSI; older commercial MOPAC licensing descriptions do not apply to this distribution.

Introduction and official sources →

MRCC

Molecular quantum chemistry

A quantum-chemistry suite implementing high-order coupled-cluster and CI methods, DFT and local-correlation approaches for accurate molecular energies.

Academic registration is free and requires an official institutional email plus a signed licence; other uses require confirmation with the developers.

Introduction and official sources →

NWChem

Molecular quantum chemistry

A high-performance computational chemistry suite spanning molecular and periodic electronic structure, classical simulation and combined quantum/classical models.

Open source under Educational Community License 2.0 (ECL-2.0).

Introduction and official sources →

Octopus

Periodic electronic structure

A real-space electronic-structure program emphasizing time-dependent DFT, response calculations and electron dynamics in molecules and materials.

GPL version 3, with separate licence exceptions for bundled external libraries.

Introduction and official sources →

OpenMM

Molecular dynamics

A programmable molecular simulation toolkit with GPU-oriented execution, Python workflows and extensible forces and integration algorithms.

Free and open source; different components use different licences, mainly MIT and LGPL.

Introduction and official sources →

OpenMolcas

Molecular quantum chemistry

An open-source quantum chemistry suite focused on multiconfigurational electronic structure, excited states, spin–orbit effects and spectroscopy.

Open source, primarily distributed as source code; verify licence files for the chosen build and external components.

Introduction and official sources →

ORCA

Molecular quantum chemistry

A molecular quantum chemistry package combining DFT, correlated single- and multireference methods, spectroscopy and molecular reaction-path tools.

Free for qualifying academic and personal use; commercial licences are supplied by FACCTs. Not an unrestricted open-source licence.

Introduction and official sources →

OVITO

Visualization and editing

A particle-data visualization and analysis tool with pipeline-based processing for atomistic trajectories, structural classification and microstructure analysis.

Basic and the Python package offer free open-source functionality; Pro requires a licence for additional features.

Introduction and official sources →

Phonopy

Scientific analysis

A phonon-analysis package for harmonic and quasi-harmonic calculations, providing dispersions, densities of states and vibrational thermodynamic properties.

Open source under the New BSD licence; external force calculators retain their own terms.

Introduction and official sources →

Psi4

Molecular quantum chemistry

An open-source molecular quantum chemistry engine with a C++ core and Python driver, including DFT, correlated methods and SAPT interaction analysis.

LGPL-3.0; the project explicitly encourages education, research and industry use.

Introduction and official sources →

PySCF

Molecular quantum chemistry

A modular Python electronic-structure library covering molecules and periodic solids, designed for composable calculations and method development.

Apache-2.0 core; extensions and numerical dependencies may use other licences.

Introduction and official sources →

Q-Chem

Molecular quantum chemistry

A molecular electronic-structure suite spanning DFT, correlated wavefunction methods, excited states, solvation and chemical reaction calculations.

Commercial licensing with annual, permanent and maintenance options; a vendor-issued licence file is required.

Introduction and official sources →

QMCPACK

Monte Carlo

A high-performance quantum Monte Carlo suite with real-space stochastic wavefunction methods and auxiliary-field QMC for correlated electronic systems.

Open source under the UIUC/NCSA licence; interfaced orbital generators have independent terms.

Introduction and official sources →

Quantum ESPRESSO

Periodic electronic structure

An open-source suite for electronic-structure and nanoscale materials modeling based on density-functional theory, plane waves and pseudopotentials.

Open-source suite; follow the licence of each distributed component and pseudopotential dataset.

Introduction and official sources →

RASPA3

Monte Carlo

A classical simulation package emphasizing Monte Carlo sampling of fluids and adsorption in nanoporous materials, with multiple statistical ensembles.

Public source with an MIT-style licence in the official repository; check the release licence and bundled data.

Introduction and official sources →

SIESTA

Periodic electronic structure

An electronic-structure and atomistic-simulation package using localized numerical atomic orbitals and pseudopotentials for molecules and extended materials.

Current SIESTA is GPL-3.0-only; older academic-only licensing descriptions do not describe current releases.

Introduction and official sources →

TURBOMOLE

Molecular quantum chemistry

A Gaussian-basis electronic-structure suite combining efficient DFT, correlated wavefunctions, excited states, spectroscopy and periodic calculations.

Licensed commercial software; academic and industrial licences are offered, with a separate free educational option subject to its terms.

Introduction and official sources →

VASP

Periodic electronic structure

A licensed plane-wave electronic-structure package for materials, supporting DFT, structural relaxation, molecular dynamics and selected beyond-DFT methods.

A VASP licence is required; obtain code and datasets only through authorized access under its terms.

Introduction and official sources →

VeloxChem

Molecular quantum chemistry

A Python-driven electronic-structure program designed for DFT molecular properties and spectroscopy through response theory on parallel computing systems.

Primarily BSD-3-Clause; third-party components retain their own copyright and licence notices.

Introduction and official sources →

VESTA

Visualization and editing

A desktop visualizer for crystal structures, volumetric data such as electron density, and crystal morphologies, with isosurfaces and structural overlays.

Officially free of charge for non-commercial users; verify permission for commercial use.

Introduction and official sources →

WIEN2k

Periodic electronic structure

An all-electron, full-potential augmented-plane-wave package for calculating electronic structure and properties of solids.

Registration and a WIEN2k licence are required; check the official order page for current terms and charges.

Introduction and official sources →

xTB

Tight binding and semiempirical

A semiempirical extended-tight-binding program implementing GFN-family methods for inexpensive geometries, frequencies and molecular screening workflows.

LGPL version 3 or later; related tools are separate projects with their own terms.

Introduction and official sources →

Yambo

Periodic electronic structure

A many-body electronic-structure code for excited-state materials properties, including GW, Bethe–Salpeter and nonequilibrium Green-function methods.

Open source under GPL; the upstream DFT program and its datasets have separate terms.

Introduction and official sources →

Open a package introduction to compare suitable tasks, limitations and official sources before choosing a tool for your research question.