Dear Teodoro Laino, I'm interested in using metadynamics, there is a graph.F code in tools/ metadyn folder without any guide. Would you please let me know how to use it? Best Regards, Nguyen, Ngoc Ha Hanoi National University of Education Faculty of Chemistry Department of Physical Chemistry Tel: Office: 04/8330842 Home: 04/7891674 Mobile: 0989133436