formchk
This utility converts the data in a Gaussian checkpoint file into formatted forms that are suitable for input into a variety of visualization software.
cubman
The cubman program manipulates cubes of values of electron density and electrostatic potential as produced by Gaussian.
cubegen
This a standalone utility for generating cubes from the data in a formatted checkpoint file.
newzmat
This utility was designed primarily for converting molecule specifications between a variety of standard formats; it can also be used for extracting molecule specifications from Gaussian checkpoint files.
c8616
The c8616 utility converts checkpoint files from Gaussian 86 through Gaussian 09 to Gaussian 25 format.
Citation
This page provides complete citations for Gaussian 25 and GaussView7, along with additional citation recommendations.