Amber Smalltalk is a Smalltalk like language implementation that compiles to Java Script, and targets browser/server side applications.
The Amber language is deeply inspired by Smalltalk. It is designed to make client-side development faster and easier. Amber includes a live development environment with a class browser, workspace, unit test runner, transcript, object inspector and debugger.
Amber is written in itself, including the compiler, and compiles into efficient Java Script, mapping one-to-one with the JS equivalent.
Amber home is www.amber-lang.net 
Development happens on Git Hub github.com
Docs are to be found at: docs.amber-lang.net
See original on c2.com