A modern programming language that makes developers happier.

kotlinlang

By the way, I'd just like to publicly thank JB here - we noticed today that the Kotlin team is actually using our open source Kotlin project as a compiler regression test suite, and is finding/fixing bugs in the upgrade to 1.1 before we ourselves are. We filed a bug yesterday (KT-16462) that was marked as a dupe of the same issue found in the same codebase by the Kotlin team a few days before, and the fix was committed to git master today. That's quite amazing support!