Appcelerator Entourage Documentation | Entourage MQ

Entourage MQ provides a simple to use publish/subscribe messaging system for HTML/JavaScript applications, empowering event-driven UI development in the web browser. MQ also provides facilities for wiring remote service (Ajax) requests to messages, which allows a client application to seamlessly interact with server-side services in the same message-oriented architecture.
(Link: Appcelerator Entourage Documentation | Entourage MQ)