Depends what you're doing obviously but I have been writing Go, Java, and Rust lately.

I cannot wait to see what becomes of Julia. I feel as if it has all the prototypical traits of python, though far more speed.

You might like Nim, too, based on that criteria. Granted, I don't know how similar it is to Python, but it seems like it's got potential.

Re: Julia

What about library integration?

You can in general write julia libraries in julia, wheres you often need to resort to C if writing Python libraries, e.g. https://github.com/python-pillow/Pillow . Therefore the native ecosystem is growing rather fast. On the other hand, Julia has great c and python interaction so making existing work accessible is not so difficult either.