Beamjs is a project mainly written in JAVASCRIPT and ERLANG, based on the BSD-2-Clause license.
Erlang-based JavaScript platform
In order to build Beam.JS, make sure you have g++, erlang & scons installed system-wide. Then just type:
$ make
After a couple of minutes (V8 takes quite some time to build), it should be over. In order to start using Beam.JS REPL, just type:
$ ./beamjs
Good luck!