I've been reading about aromaticity/antiaromaticity measures in the article: 'The Aromaticity/Antiaromaticity Continuum. 1. Comparison of the Aromaticity of the Dianion and the Antiaromaticity of the Dication of Tetrabenzo[5.5]fulvalene via Magnetic Measures ' And I wonder, whether there's any piece of software, that can manage to make some quantitative estimations.