I think the contenders here are Google's Go, Mozilla's Rust and for an academic longshot BitC. Thus far, Go is the most mature & has the most traction, but is

I think the contenders here are Google's Go, Mozilla's Rust and for an academic longshot BitC. Thus far, Go is the most mature & has the most traction, but is still very much in its early days and a minority sport. Outside of Google, the most ambitious use of Go in production is Heroku's Doozer. There are those who would say D should be in my list above. However the D community seems to be fatally divided and D has failed to get sufficient traction despite being around for quite a few years.