In this chapter, you have built a complete application with a server-side component, an XMPP-FTW extension for adding messages with your own namespace, and clients that connect to the server and send messages back and forth. Hopefully you've had some fun while gaining deeper knowledge that demonstrates how you can apply XMPP in your own real-world applications.

Speaking about real-world applications, when you do develop your business applications and consider deploying them, there are several factors that you'll need to keep in mind regarding concerns of security, scalability, and so on. Fortunately, XMPP provides powerful capabilities to support your deployed, real-world applications, and you're going to learn about those in the next chapter.

You will also read more about various XMPP Extension Protocols (XEPs), and get a sense for how XMPP continues to grow in a world that is evolving toward new things like Universal Plug and Play, the Internet of Things, and WebRTC.