http://vertx.io/docs/

https://github.com/vert-x3/vertx-awesome

presentations:
https://www.youtube.com/watch?v=SsJQTvp_F0Y
http://www.javaadvent.com/2015/12/reactive-programming-with-vert-x.html

whatsnew:
https://github.com/vert-x3/wiki/wiki/3.4.0---Release-Notes