TypeScript won
BASARAT
49542

Have you looked at Flow? Syntactically, it’s nearly identical TypeScript. It has a more powerful type system. It leverages Babel and has the weight of Facebook behind it. It has decent tooling via IntelliJ and Facebook’s official Atom plugin “Nuclide.”

If the goal is to declare a winner, I think you omitted a leading contenders

One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.