The Server Side - Includes news, message boards, product reviews, and patterns repository. - http://www.theserverside.com/
Oracle Technology Network Java - Documentation, downloads, and developer support resources. - http://www.oracle.com/technology//tech/java/index.html
IndicThreads - Java J2EE portal for India. News, book reviews, blogs, interview, latest events, and a Java certifications section. - http://www.indicthreads.com/
JSP and Servlet Reference Materials - Free PDF of course materials from training courses on JavaServer Pages (JSP) and Java Servlets. - http://courses.moreservlets.com/Course-Materials/
Punit Pandey's Weblog on Portlets, OOA/D and J2EE - Happenings and learning material about Portlets, OOA/D, Software Architecture and Design, Design Patterns, Software Methodologies, J2EE. - http://www.jroller.com/page/portlets
Portlet FAQ - A collection of Frequently Asked Questions on Java Portlet and Portal Technology. - http://www.jroller.com/page/portletfaqs
Portlets Development for Portals - Resources and events related to portals, portal servers, and portlets to help in learing portlets and related issues. - http://portlets.blogspot.com/
Resources For Java Server-Side Developers - Collection of links for Java server-side developers. Includes articles, books, chats, FAQs, forums, mailing lists, presentations, software, tips, tutorials, user groups, weblogs. - http://www.java201.com/
J2EEOlympus - J2EE news, articles, white papers, tutorials, free available books and other books. - http://www.j2eeolympus.com/
Essential Servlet and JSP Programming Resources - Servlet and JSP documentation, specifications, IDEs, servers, books, training courses, Web hosting providers. - http://resources.coreservlets.com/index.html
OnJava.com - Articles as well as enterprise news and information. - http://www.onjava.com/