Petri .NET Simulator 

Check out a simulation suite for Petri structures on a computer. Generate drawings with all the integrated elements of functional networks, work with existing models, and simulate the work of flexible manufacturing systems. Additionally, build and test events.

Petri .NET Simulator is an application that can be used for the drawing and simulation of Petri nets. The application has been designed for modelling and simulation of flexible manufacturing systems but it can be used for other discrete event systems as well.