BuckleScript: write JavaScript faster, safer and smaller
"BuckleScript is one of the very few compilers which compiles an existing typed language to readable JavaScript."Elm (type inference) is sort of. While there is a lot of OS type projects used, having bloomberg use it is a plus. Interesting that FB have build system ^Reason^ (build system) doing something similar (OCaml backend->JS) ~ http://facebook.github.io/reason/