Liferay offers Web publishing and content management features, an enterprise service bus and service-oriented architecture.
Here are some key features of "Liferay Portal":
· Runs on all major app servers & servlet containers, databases, and operating systems (over 700 deployment combinations)
· Uses the latest in Java, J2EE, and Web 2.0 technologies
· JSR-168 compliant
· Over 60 portlets out-of-the-box
· Personalized pages for all users
· Benchmarked as among the most secure portal platforms using LogicLibrary's Logiscan suite
· Built in Content Management System (CMS) & Collaboration suite