I had a look at the open source SummingBird as a possible way to implement a (soft) real time project I have, because I'm not specially Java-ish and Storm does not seem to play that nice with Scala (I've been told it works decently with Clojure, though, that might have been a solution to my non-Javaness) and it looked somewhat stale.

Ditched it and decided to do it in Spark with Scala (making it a good excuse to learn Scala). With so many real time options popping up and around, deciding which to pick is getting harder and harder.