Enterprise Social Network (ESN) is an open-source project to develop a framework of a social network in Java EE 5, EJB 3.0. The objective is to build a basic framework that models a social network graph in Java EE. This basic framework will provide some basic functions of a social network. It can be further extended according to client needs to incorporate a bigger set of end-user functionality. In future, ESN may be developed into a full-fledged out-of-box Java EE based social network product. Click here to learn more.