Not to forget about Julia http://julialang.org/ and its high-performance JIT compiler.

A comparison with some of Julia's features:

(1) Multiple dispatch: providing ability to define function behavior across many combinations of argument types

Scala has the Cake Pattern

(2) Built-in package manager

SBT, anyone?

(3) Automatic generation of efficient, specialized code for different argument types

Dotty's Linker is on the horizon, https://d-d.me/talks/scaladays2015/#/