# NDTwin Applications
Use two NDTwin existing applications (for energy-saving and traffic-engineering purposes, respectively) as concrete examples to demonstrate how to run up NDTwin Apps and how they optimize the operations of a network for different purposes.

Canonical URL: https://www.ndtwin.org/docs/tutorials-and-demo-videos/ndtwin-applications/

---




## Pages
- [Energy-Saving App](https://www.ndtwin.org/docs/tutorials-and-demo-videos/ndtwin-applications/energysavingapp/)
- [Traffic-Engineering App](https://www.ndtwin.org/docs/tutorials-and-demo-videos/ndtwin-applications/trafficengineeringapp/)