StepSim is a lightweight step-based simulation module written in Python, can perform real-time simulations of discrete systems. StepSim supports step-by-step simulation or can run until a break condition occurs.
Simulations are made up of containers and converters. A container stores a discrete amount of units of a certain type. A converter draws units from one or more containers and delivers the result to another container.
StepSim does not even attempt to do any parallel processing. It processes converters round-robin in a fixed order.

Requirements:
* Python

The license of this software is Free, you can free download and free use this calculator software.