ngrok is a fun and very easy tool I use from time to time in demos or when running a training.
It opens a public tunnel (that of course can be protected) to connect to your local server. Really nice if you are in a different network than your audience, or hidden between a DSL router etc.
In the webcast below I show how to access WebLogic 12.2.1 running on localhost:7001
You read it here first 🙂