wxMacMolPlt is an open-source, cross-platform (Mac OS X, Linux and Windows) gui
for preparing, submitting and visualizing input and output for the GAMESS
quantum chemistry package. Features include a graphical molecule builder, GAMESS
input generation, animation of output and visualization of molecules, normal
modes, orbitals and other properties.

MacMolPlt is designed to be easy to use by the novice chemist yet has many
powerful features that will be immediately indespensible to the advanced user.

WWW: https://brettbode.github.io/wxmacmolplt/