Swings to EJB communication without RMI port

I have swing based web application. Currently, the Swing clients communicates to EJB which is running in re开发者_开发知识库mote server through third party 'HTTP Tunneling' tool (JProxy). This is commercial tool. my question is:

1. Is there any other open source / free 'HTTP Tunneling' tools equivalent to JProxy using which the Swing clients can communicate to EJB.
2. What are the ways a Swing client can communicate to EJB other than RMI protocal.

I suppose you could create a Web Service to communicate to your backend

• http://en.wikipedia.org/wiki/Web_service
• http://java.sun.com/webservices/