How to share web content between 2 applications?

Hi Ranchers,

Is there a way to share content between web sites without using portlets or iFrames in Java. For example, there is a main website written in JSF, which has the header, main content, rhs panel, lhs panel, footer, and menu sections. What if you want to bring in content from another JSF application to fit into the main content section for certain menu options. What is best way to share session information between these two applications?