Spring - Application Framework

Spring is an Application framework which has Inversion of Control container, Aspect-oriented programming framework, Data access, Transaction management, Model-view-controller for web, Remote access framework (RPC) and lot more. It is well integrated with Toplink, Hibernate, JDO, and iBATIS.

Spring Social is an extension of the Spring Framework that enables applications to connect with Software-as-a-Service (SaaS) providers such as Facebook and Twitter and interact with those services on behalf of their users.