Fortree is a python app that creates call trees of your fortran code. Fortree makes call trees, definition trees and dependencies trees. To use Fortree: 1) Make sure Python 3 is installed on your machine (you need: numpy, gv, re). 2) Create an initalization file (use init.txt given as an example). 3) launch the code as so: ~$ Python3 fortree.py init.txt Contains: init.py fortree.py parser.py treeNode.py render.py module.py routine.py For any issues, you can contact me here: esther.taillifet@univ-lyon1.fr