I have this developer roadmap <a href="http://github.com/kamranahmedse/developer-roadmap" rel="nofollow">http://github.com/kamranahmedse/developer-roadmap</a> that is updated every year and has a bunch of recommendations on everything if it may help
Elixir, Julia, Rust.<p>Elixir - Tried Erlang a long time ago, totally sold on Lisp and message passing since then.<p>Julia - Interested in multimethods and sort-of typing as core language features.<p>Both of them: I miss macros.<p>Rust - Some of my hobby stuff is in C/C++ but I don't particularly enjoy the compilation model or lack of safety.<p>Out of the three, Elixir is probably the most immediately relevant to me (web developer), so that's probably what I'll end up exploring next.