Angular Momentum Coupling Coefficients
Fortran 90 code by Paul Stevenson.
Assisted Model Building with Energy Refinement (AMBER)
Package of molecular simulation programs in Fortran 77 and C, distributed subject to a licensing agreement.
Columbus
Performs general ab initio electronic structure calculations within the framework of MR-CISD and related methods including size-extensivity corrections.
Combustion Simulation
Links to MECHMOD, software aid to the development of reaction mechanisms, and KINAL/KINALC, programs for the simulation and analysis of general mass action kinetics reaction mechanisms.
Computational Chemistry
ICON-EDiT is a program package that performs extended-Hückel molecular orbital and oscillator strength calculations on molecules. The complete program package can be downloaded, along with examples and a manual. BICON-CEDiT performs extended-Hückel crystal orbital and oscillator strength calculations on solids. The complete program package can be downloaded, along with examples a manual, and k-point sets.
Computational Chemistry List: Fortran codes
Archive of Fortran codes.
Dalton Quantum Chemistry Program
Calculates molecular properties with SCF, MP2, MCSCF or CC wave functions. The strengths of the program are mainly in the areas of magnetic and (frequency-dependent) electric properties, and for studies of molecular potential energy surfaces, both for static and dynamical investigations.
DelPhi
Computes numerical solutions to the Poisson-Boltzmann equation (both linear and nonlinear form) for molecules of arbitrary shape and charge distribution.
Dirac
Fortran (and a bit of C) code for relativistic molecular calculations based on the Dirac-Coulomb Hamiltonian. Free for academic use.
Fast Newton-Raphson Torsion Angle Minimizer (FANTOM)
Calculates low-energy conformations of polypeptides and proteins, compatible with distance and dihedral angle constraints obtained typically from NMR experiments. Free for academics.
FSatom
Links to free software, primarily Fortran, for atomic scale simulations, including the topics of Molecular Dynamics/Force Fields, Tight binding, Quantum Chemistry: Hartree Fock/MP/CC/CI, Density Functional Pseudopotential/Pseudoprojector generators, Quantum Monte Carlo, and Many-Body Perturbation Theory (GW, Bethe-Salpether).
Gaussian 03
Predicts the energies, molecular structures, and vibrational frequencies of molecular systems, along with numerous molecular properties derived from these basic computation types. It can be used to study molecules and reactions under a wide range of conditions, including both stable species and compounds which are difficult or impossible to observe experimentally such as short-lived intermediates and transition structures. [Commercial]
GDMA
Fortran 90 program by Andy Stone to carry out Distributed Multipole Analysis of wavefunctions calculated by the Gaussian system of programs, using the formatted checkpoint files that they produce. The result is a set of multipole moments at sites defined by the user (usually at the positions of the atomic nuclei) which, given an accurate wavefunction, provide an accurate description of the electrostatic field of the molecule. It is very fast, typically requiring only a few seconds of cpu time.
Gemini
F (Fortran 95 subset) program by Bob Charity to calculate the decay of a compound nucleus via the statistical model.
General Atomic and Molecular Electronic Structure System (GAMESS)
General ab-initio quantum chemistry package.
Graphatom
Fortran 90 program by Natalie Holzwarth to calculate the electronic energy and density for an atom using density functional theory. For a specified atomic configuration, the optimal electronic wavefuncitions are calculated numerically. Designed for student use.
MDynamix: A Molecular Dynamics Program
General purpose molecular dynamics Fortran 77 code for simulations of mixtures of either rigid or flexible molecules, interacting by AMBER-like force field in a periodic rectangular cell. In the case of flexible molecules the double time step algorithm is used.
MOLPRO
Ab-initio Fortran 90 programs for molecular electronic structure calculations, designed and maintained by H.-J. Werner and P. J. Knowles.
Natural Bond Orbital (NBO)
Fortran 77 program to compute charges, bond types, hybrid directions, resonance weights, bond orders and other familiar valence descriptors. [Commercial]
NWChem
Computes the properties of molecular and periodic systems using standard quantum mechanical descriptions of the electronic wavefunction or density. In addition, NWChem has the capability to perform classical molecular dynamics and free energy simulations. In order to obtain NWChem, you must be a permanent faculty or staff member of the facility or institution you are associated with.
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