With the announce of their 2.0 release candidate, Liferay significantly widens the pool for opensource JSR168-compliant enterprise portal software ...

Liferay is a free open-source implementation of an
enterprise portal server similar to Jetspeed, WebSphere, Plumtree and Epicentric. It provides personalization features similar to Yahoo and a vast array of pre-built portlets such as Mail, News, Shopping Cart, Message Board, Wiki, and many more. All the portlets are JSR-168 compliant.

Liferay is licensed under an MIT opensource license and ships with JBoss/Tomcat, JBoss/Jetty or Orion. A full demo can be seen on my.liferay.com and the project development can be tracked on SourceForge

Besides, he's on a mission from God

[ Source: Liferay ]