the new Crossbar 0.9.6 release features something really neat, in particular since it lowers the barrier to entry:
Application templates for 5 languages: Python, NodeJS, C++, Erlang, PHP
You generate a new app simply by:
crossbar init --template hello:XXX --appdir $HOME/hello
where XXX specifies the language.
Using this kind of templating gets you started quickly. Just generate the app template of choice and modify from there.
What other Crossbar app / node templates would you like to see?
Note: the PHP template code is not completely done yet.