JCoffeeScript
JCoffeeScript is a java library that compiles CoffeeScript 1.1.
Usage
from the command prompt:
echo "a = 1" | java -jar jcoffeescript-1.1.jar
      (function() {
          var a;
          a = 1;
       })();
 
####Command Line (unix/windows):
java -jar jcoffeescript-1.1.jar < foo.coffee > foo.js
####command line options:
--bare - compile the javascript without top-level function safety wrapper.
####From java:
String javascript = new org.jcoffeescript.JCoffeeScriptCompiler().compile("a = 1");
####From jruby: 
 
  
  if "java" == RUBY_PLATFORM then
 
 
    # use jcoffeescript implementation
   require 'java'
   class CoffeeScriptCompiler
        def initialize
            @compiler = org.jcoffeescript.JCoffeeScriptCompiler.new
        end
        def compile(source)
            @compiler.compile(source)
        end
    end
else
    # use shell out to coffee implementation
    require 'open3'
    class CoffeeScriptCompiler
        def compile(source)
            return Open3.popen3('coffee --eval --print') do |stdin, stdout, stderr|
              stdin.puts source
              stdin.close
              stdout.read
            end
        end
    end
end
compiler = CoffeeScriptCompiler.new
compiler.compile('a = 1')
  #### Thanks Thanks to Jeremy Ashkenas and all contributors to the coffeescript project. Thanks to Raphael Speyer for helping with the design. Thanks to Daniel Cassidy for putting a lot of work into the code. Thanks to PandaWood for maintaining the code. [JCoffeeScript Homepage](http://yeungda.github.com/jcoffeescript)