This distribution includes the Mozilla Rhino 1.6 release 5 binary distribution. You can also get that distribution from the following URL: ftp://ftp.mozilla.org/pub/mozilla.org/js/rhino1_6R5.zip Source code for Rhino is available on the Mozilla web site: http://www.mozilla.org/rhino/ Rhino is licensed under both the MPL (Mozilla Public License) 1.1 and the GPL (GNU General Public License) 2.0, which are in the LICENSE.js.txt file.