Thanks for your interest in Errai Navigation. I've just written up a new chapter in the reference guide that documents it: https://docs.jboss.org/author/display/ERRAI/Errai+UI+Navigation
As far as an example app that uses it, check out the grocery list demo here: https://github.com/errai/errai/tree/master/errai-jpa/demos/errai-jpa-demo-grocery-list
The grocery list demo is a work-in-progress. I didn't mention it in the blog post because it's currently a bit of a moving target, and I didn't want to point to something that will break or move to a new home without warning . The demo combines Errai JPA, UI Templates, Data Binding, CDI, and Navigation into one app. I'm aiming for it to be a complete example of how best to use all the parts of Errai together. As such, it will probably migrate into a top-level demos folder at some point in the future.