Ruby, extensively. It's enjoyable and quite useful. Meta programming makes me think of Lisp, but need to be careful of side effects.

Go, recently I've been using it for certain services and APIs. Really great for concurrent programming for services, syntax is nice too.

Python, I've used a few times over the years and have used it with personal projects a number of times. Still like python quite a bit.

(Bonus: nimrod, which I'm helping build a new type system for, Clojure and Scala I've played with extensively but never had a chance to use in production, and C/C++/Vala I've used when doing desktop programming on Linux for Elementary)