Ajax Form Validation Using Spring and DWR [java.net]
   Eric Spiegelberg shows how to use DWR and Spring to apply server-side validation on client-side Ajax web apps.
   http://today.java.net/pub/a/today/2007/02/07/ajax-form-validation-using-spring-and-dwr.html

Atomogy
   A software engineering and software development firm, with extensive expertise in JEE and open-source leveraged business systems development.
   http://www.atomogy.com/

Componative
   Dedicated to delivering products and services for component-based enterprise applications build with J2EE technology.
   http://www.componative2.com/

Coreservlets.com
   JSP and servlet specifications, documentation, servers, IDEs, books, training courses, Web hosting providers.
   http://www.coreservlets.com/

Designing Enterprise Applications with the J2EE Platform
   Online version of book from Sun that covers "best practices" for developing and deploying enterprise applications using enterprise Java technologies.
   http://java.sun.com/blueprints/guidelines/designing_enterprise_applications/index.html

EJB City
   Offers software development, system architecture and project management for all kind of Java applications - from embeded to enterprise and distributed applications. The company's main expertise lies in Enterprise applications.
   http://www.ejb-city.de/

Fyodor, Kupolov
   J2EE for beginners. FAQ, Forum, J2EE Products matrix, J2EE antipatterns.
   http://j2ee.by.ru/

JSoft
   J2EE applications custom programming. HorizonJ, an Java application architecture framework.
   http://www.horizonj.com/

Java EE at a Glance
   Suns site includes a list of technologies, white papers, news, FAQs, glossary, mailing list, forums, and downloads.
   http://java.sun.com/javaee/

Mastering EJB, Second Edition
   Includes source and complete text as PDF for this Enterprise JavaBeans programming offering.
   http://www.theserverside.com/tt/books/wiley/masteringEJB/

Natali
   Uses EJB, Hibernate, PostgreSQL, JSP, Struts and allows to maintain books, magazine records, and other library related items through a web interface. [Open source, GPL]
   http://www.codegravity.com/projects/natali

Servlet Mailing Lists
   Collection of Servlet/JSP related mailing lists with searchable archives.
   http://www.servlets.com/lists/index.html

Woodger Computing
   A consulting firm specializing in Enterprise Java. It helps projects defining architecture, do analysis, design and development of web applications.
   http://www.woodger.ca/