JRuby is an 100% pure-Java implementation of the Ruby programming language.
    *  A 1.8.6 compatible Ruby interpreter written in 100% pure Java
    * Most builtin Ruby classes provided
    * Support for interacting with and defining java classes from within
      ruby
    * Bean Scripting Framework (BSF) support
    * Distributed under a tri-license (CPL/GPL/LGPL)

WWW:	http://jruby.codehaus.org/