Rhino: JavaScript for Java


Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.
Downloads
How to get source and binaries.
Documentation
Information on Rhino for script writers and embedders.
History
The ancestry of the beast.
Help
Some resources if you get stuck.

Module owner 
Rhino image courtesy of Paul Houle.