* Python * Common Lisp
For Work:
* Pandas (Learning Python resulted in me being asked to help our 'data team' get started with Pandas)
* Go (I moved to that Team)
* Protobuf (google protocol buffers)
I've played around with some other technologies along the way as I enjoy learning various languages. But I wouldn't say I really become good with them, some other's that I've played with this year:
* OpenDylan
* Erlang
* Django
EDIT: Formatting