Hi Luciano,
Unfortunately a such sample application doesn't exist yet due to lack of time.
JRebirth Application Framework has been designed to suit any kind of application : Game, Slideshow but also IT Applications with its Data centric Model.
I will try to quickly build one as it's really a good idea to describe JRebirth features.
So you can find inspiration from
MasteringTables that uses all kind of JRebirth components.
The main advice I could give you is:
When it becomes too complex or will be reused => Split It !
Command should be added on demand to factorize your code and manage threaded operations.
Each screen of your application should have at least one Model (+View+Controller), but could be composed by several ones if it's too complex.
Create a service each time you need to keep some data between call, Service is perfect to call a remote service into it.
Globally don't forget one important point, each JRebirth Component that is strongly referenced could be the source of a memory leak, but the inverse could be a loss of data.
Let me know if you have any suggestion for the demo application that could help your developments.
A final word, you will have to choose your version, latest 7.7.2 (will be released this WE) or 8.0.0-SNAPSHOT (a little bit instable but with some API changes to be more reactive and rewritten with Java8' style)
Don't hesitate to post all your questions
Seb