parse and display Gaussian, GAMESS, and etc's output

 GaussSum parses the output files of ADF, GAMESS, GAMESS-UK, Gaussian, Jaguar
 and PC GAMESS calculations to extract useful information.
 .
 GaussSum uses GNUPlot to display the progress of geometry optimisations,
 density of states spectrum, UV-VIS spectra, IR spectra, Raman spectra,
 and electron density difference maps. It can also display all lines containing
 an arbitrary phrase and more.