D mentioned but Rust wins

[Nick B via Digitalmars-d]

[snip] Crowling, Turner, and others originally built Magic Pocket 
using a new programming language from Google called Go. Here too, 
Dropbox is riding a much larger trend, languages designed 
specifically for the new world of massively distributed online 
systems. Apple has one called Swift, Mozilla makes one called 
Rust, and there’s an independent one called D. All these 
languages let coders build software quickly that runs 
quickly—even executed across hundreds or thousands of machines.

source: 
http://www.wired.com/2016/03/epic-story-dropboxs-exodus-amazon-cloud-empire/