Package of molecular simulation programs in Fortran 77 and C, distributed subject to a licensing agreement.

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.

Archive of Fortran codes.

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.

General ab-initio quantum chemistry package.

Most programs are in Fortran.

Codes by Kieran Lim for chemical dynamics, a vibrationally adiabatic impulsive dissociation model, Huckel orbital theory, calculation of gas-kinetic collision rate coefficients, and Monte Carlo quasiclassical trajectory simulation.

Computes the total energy absorption cross section for the photodissociation of a diatomic molecule using Time-Dependent Quantum Dynamics.

Quantum Monte Carlo code, available on request, to solve the electronic, non-relativistic, clamped-nuclei Schrödinger equation. The current version performs variational Monte Carlo (VMC) and fixed-node diffusion Monte Carlo (DMC) computations of the energy and other properties of atoms and molecules.

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]