A nice example of how Pharo can be used for
domain-specific modeling and simulation. Short 
session from one of our projects at Rochelle:

https://www.youtube.com/watch?v=Z7wJNhAIaVQ

Some additional info here: https://goo.gl/jS4NjB

Currently investigating how to incorporate the new Bloc based 
widgets of @feenkcom into the workflow.

Cheers,

Nick