Gabedit

Gabedit is a graphical user interface to GAMESS (US), Gaussian, MOLCAS, MOLPRO, MPQC, OpenMopac, PC GAMESS, ORCA and Q-Chem computational chemistry packages.

Major features

 * Builds molecules by atom, ring, group, amino acid and nucleoside.
 * Creates an input file for computational chemistry packages.
 * Reads output from the ab initio packages, and supports a number of other formats.
 * Displays molecular orbitals or electron density as contour plots or 3D grid plots and output to a number of graphical formats.
 * Animates molecular vibrations, contours, isosurfaces and rotation.