You can go to the NASA site to pick up some NASA Software, and a surprising amount of it is actually free. You can download the NASA Software catalog in PDF format, or browse the collection by category from the home page. A lot of it models real-world systems and physics in ways that allow you to simulate all kinds of dynamic systems, but they also have a lot of process management and scheduling tools available.
![Free NASA Software Free NASA Software](https://jstrider.info/wp-content/themes/free-template/assets/images/header-bg.jpg)