자바 프로그래밍에 유용한 웹사이트

EJB

Apache Geronimo
http://geronimo.apache.org/

JAVA

자바지기
http://www.javajigi.net/

DNA 기술자료 JAVA
http://dna.daum.net/technote/java

Free Java Programming with Passion! Online Course
http://www.javapassion.com

Java Example
http://www.java2s.com/

SUN - The Source for Java Developers
http://java.sun.com/

The Java Tutorials Weblog
http://blogs.sun.com/thejavatutorials/

Java Library

JTidy - HTML Parser
http://jtidy.sourceforge.net/

Lucene - 검색엔진
http://lucene.apache.org/ 

MINA - network application framework
http://mina.apache.org/

POI - Microsoft Format File을 액세스 할 수 있는 API
http://poi.apache.org/

Velocity - 템플릿엔진
http://velocity.apache.org/

JSP & Servlet

자카르타 서울 프로젝트
http://www.apache-korea.org/

JAVASCRIPT

Active Widgets
http://www.activewidgets.com/

ExtJS
http://extjs.com/

mootools
http://demos.mootools.net/Accordion

MSDN JavaScript 개체 지향 기술을 이용한 고급 웹 응용 프로그램 만들기
http://msdn.microsoft.com/msdnmag/issues/07/05/JavaScript/default.aspx?loc=ko

prototype
http://www.prototypejs.org/

XML

XML Schema Part 2: Datatypes Second Edition
http://www.w3.org/TR/xmlschema-2/

ETC.

JSON
http://json.org/json-ko.html

Tools & Plug-ins

Eclipse
http://www.eclipse.org/

Adobe Lab
http://labs.adobe.com/