Liferay is an enterprise portal. It handles users and portlet
drawing, has a full administrative interface, supports all the major
databases and the main J2EE application servers, and has single
sign-on capabilities and multiple language support. It uses Apache
Lucene for document searching. A number of portlets are included,
including a guestbook, a calendar, a mapping utility which uses
Expedia, news, polls, a document library, and live stock information.
