5. TypeScript, DART, & CoffeeScript
Micorsoft / Open Source Google / Open Source Jeremy Ashkenas / Open Source
Open Source
http://typescript.codeplex.com/
Open Source
https://code.google.com/p/dart/
Open Source
https://github.com/jashkenas/coffee-script/
http://coffeescript.org/http://www.dartlang.org/http://www.typescriptlang.org/