To answer my own question, I think Rust might be it (for manual memory
management/secure):
http://blog.rust-lang.org/2015/04/03/Rust-1.0-beta.html
The final Rust 1.0 release is scheduled for May 15th - today.
There probably will not be any official complementary language. I'm aware
of PyCall
Topics on the Julia mailing lists should generally be concrete and focused.
Questions about actual Julia usage are always welcomed, but there are many
other, more suitable venues on the internet for open-ended/speculative
discussion (e.g. Reddit/proggit).
On Fri, May 15, 2015 at 6:31 AM, Páll