This article from http://www.blogjava.net/mlh123caoer/archive/2007/08/25/139337.html
SourceForge http://www.sourceforge.net
Java.net http://www.java.net
Www.eclipse.org
Www.opensource.org
Http://strutstestcase.sourceforge.net(StrutstestcaseIs based onJUnitA convenient testStrutsTesting Framework)
Lomboz http://www.objectlearn.com/index.jsp (J2EE plugin for eclipse)
Htmlarea http://sourceforge.net/projects/itools-htmlarea/ (WYSIWYG online HTML editor)
Xmlbuddy http://www.xmlbuddy.com/(XML editor plugin for eclipse)
Jfreechart http://www.jfree.org/(project used to generate charts)
Eclipseme http://eclipseme.sourceforge.net/(j2developmnt plugin for eclipse)
Mvnforum http://sourceforge.net/projects/mvnforum/ (ForUM)
Jchatbox http://www.javazoom.net/index.shtml (Web chat engine implemented by Servlet)
Poi http://jakarta.apache.org/poi/index.html (project used to process documents such as Excel and Word)
Fileupload http://jakarta.apache.org/commons/fileupload/ (used to process HTTP File Uploaded Projects)
Product_box http://sourceforge.net/projects/pdfbox/ (items that process PDF documents)
Lucene http://jakarta.apache.org/lucene/index.html (search engine)
Digester http://jakarta.apache.org/commons/digester/ (project that processes XML Information)
DBCP http://jakarta.apache.org/commons/dbcp/ (Database Connection Pool)
Axis http://ws.apache.org/axis/ (implementation framework of WebService)
Jetspeed http://portals.apache.org/jetspeed-1/ (portal)
HSQLDB http://sourceforge.net/projects/hsqldb/ (im memory database engine)
Cewolf http://sourceforge.net/projects/cewolf/ (a set of tag libraries for web reports using the jfreechart engine)
Struts menu http://sourceforge.net/projects/struts-menu/ (Struts-based Web menu Project)
Htmlparser http://sourceforge.net/projects/htmlparser/ (a project for parsing HTML Information)
Mondrian http://sourceforge.net/projects/mondrian/ (Open Source OLAP database)
Proguard http://sourceforge.net/projects/proguard/ (Java obfuscators)
Infoglue http://sourceforge.net/projects/infoglue/ (J2EE Content Management System)
July http://sourceforge.net/projects/jpivot/ (web-based OLAP presentation)
Http://java-source.net/
(5) Address collection of several common Java open source projects:
Lomboz http://www.objectlearn.com/index.jsp (J2EE plugin for eclipse)
Htmlarea http://sourceforge.net/projects/itools-htmlarea/ (WYSIWYG online HTML editor)
Xmlbuddy http://www.xmlbuddy.com/(XML editor plugin for eclipse)
Jfreechart http://www.jfree.org/(project used to generate charts)
Eclipseme http://eclipseme.sourceforge.net/(j2developmnt plugin for eclipse)
Mvnforum http://sourceforge.net/projects/mvnforum/ (ForUM)
Jchatbox http://www.javazoom.net/index.shtml (Web chat engine implemented by Servlet)
Poi http://jakarta.apache.org/poi/index.html (project used to process documents such as Excel and Word)
Fileupload http://jakarta.apache.org/commons/fileupload/ (used to process HTTP File Uploaded Projects)
Product_box http://sourceforge.net/projects/pdfbox/ (items that process PDF documents)
Lucene http://jakarta.apache.org/lucene/index.html (search engine)
Digester http://jakarta.apache.org/commons/digester/ (project that processes XML Information)
DBCP http://jakarta.apache.org/commons/dbcp/ (Database Connection Pool)
Axis http://ws.apache.org/axis/ (implementation framework of WebService)
Jetspeed http://portals.apache.org/jetspeed-1/ (portal)
HSQLDB http://sourceforge.net/projects/hsqldb/ (im memory database engine)
Cewolf http://sourceforge.net/projects/cewolf/ (a set of tag libraries for web reports using jfreechart charts)
Struts menu http://sourceforge.net/projects/struts-menu/ (Struts-based Web menu Project)
Htmlparser http://sourceforge.net/projects/htmlparser/ (a project for parsing HTML Information)
Mondrian http://sourceforge.net/projects/mondrian/ (Open Source olapdatabase)
Proguard http://sourceforge.net/projects/proguard/ (Java obfuscators)
Infoglue http://sourceforge.net/projects/infoglue/ (J2EE Content Management System)
July http://sourceforge.net/projects/jpivot/ (web-based OLAP presentation)
Httpclient http://jakarta.apache.org/commons/httpclient/ handles HTTP client interfaces