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@@ -922,6 +922,7 @@ _Libraries for scientific computing. Also see [Python-for-Scientists](https://gi
 - [NumPy](http://www.numpy.org/) - A fundamental package for scientific computing with Python.
 - [ObsPy](https://github.com/obspy/obspy/wiki/) - A Python toolbox for seismology.
 - [Open Babel](https://open-babel.readthedocs.io/) - A chemical toolbox designed to speak the many languages of chemical data.
+- [PathSim](https://github.com/pathsim/pathsim) - A block-based system modeling and simulation framework with a browser-based visual editor.
 - [PyDy](http://www.pydy.org/) - Short for Python Dynamics, used to assist with workflow in the modeling of dynamic motion.
 - [PyMC](https://github.com/pymc-devs/pymc3) - Markov Chain Monte Carlo sampling toolkit.
 - [QuTiP](http://qutip.org/) - Quantum Toolbox in Python.