Molecular dynamics (Energy minimization, trajectories, approximations)
Quantum Electrodynamics (QED) Schwinger
Born-Oppenheimer Approximation
Quantum Engines Molecular Orbital Methods
Semiempirical Hartree-Fock methods
Modified Intermediate Neglect of Differential Overlap (MINDO)
Modified Neglect of Diatomic Overlap (MNDO) - AMPAC, MOPAC
SemiChem Austin Model 1 (SAM1) - Explicitly treats d-orbitals.
ab initio Hartree-Fock programs:
Semiempirical Engines (Molecular Mechanics) from above & spectroscopy
AMBER, Discover, SYBYL, CHARMM, MM2, MM3, ECEPP.
(Chemistry at HARvard Molecular Mechanics),