Hyperlink: Programming: Java: Tools: Sources
Meta-Reference on Information Technology

Java Projects & Source Code Repositories

• Java.net Projects
  By java.net - The Source for Java Technology Collaboration.
• Java-Source.net
  Open Source Software in Java.
• JavaForge
  JavaForge.com, scalable project hosting for your open source Java projects.
• Giant Java Tree
  The Giant Java Tree is an open source project whose primary aim is to create a Java source tree consisting entirely of open source.
• Java Shareware
  JavaShareware promotes Java™ through sharing resources and has created a comprehensive Java site that includes Java Applications, Applets, Classes, Servlets, Beans, Development Tools and hundreds of other Java projects.
• JARS.com - Java Review Service, by EarthWeb (link alternativo)
  The #1 Java Review Service - Top rated by jars.
• Google Directory: Java Class Libraries
• Google Directory: Java Code Directories

Apache Java

• The Apache Jakarta Project
  The Jakarta Project and its ramifications create and maintain open source solutions on the Java platform for distribution to the public at no charge. They are projects of The Apache Software Foundation (ASF) and all work is provided on a volunteer basis.
  Jakarta originated or groups products and sub-projects in some general categories. Many Jakarta sub-projects have grown and became independent Apache top-level projects (TLP).
  • Libraries, APIs, Frameworks and Engines:
    Byte Code Engineering Library (BCEL), Bean Scripting Framework (BSF), Cactus (test), Commons, Element Construction Set (ECS), HiveMind (microkernel), HttpComponents, Java Caching System (JCS), JMeter (functional and performance load test), Log4J (logging services), Lucene (search engine), ORO, POI (Microsoft formats), Slide (content management WebDAV), Regexp, Struts (web MVC), Tapestry (web MVC), Taglibs (web JSP), Turbine (web), Velocity (templates).
  • Server Applications:
    Excalibur/Fortress (IoC container), James (e-mail), Slide, Tomcat (J2EE web), Portals & Jetspeed.
  • Database:
    ObJectRelationalBridge (OJB), Torque.
  • Build and Integration:
    Ant (build), Gump (continuous integration), Maven (software project management).
• Apache Software Foundation (ASF)
  With all grown originated around the Jakarta project, most of the current open source software projects from Apache Foundation, which raised for the Apache HTTPd web server (used in most of Internet sites), are related to Java.
  • Java EE:
    ActiveMQ (message queue JMS), Beehive (web), Cayenne (ORM JPA), Geronimo (full JEE server), Jackrabbit (content repository JCR), MyFaces (JSF), OpenEJB (EJB container), OpenJPA (JPA), Wicket (web POJO).
  • XML:
    Cocoon (web XML), Forrest (publishing), Lenya (CMS Java/XML), Web Services (Axis, jUDDI etc.), Xalan (XSLT Java/C++), Xerces (XML parser Java/C/Perl), XMLBeans (XML bind XPath/XQuery), XML Graphics (FOP XSL-FO, Batik SVG).
  • Harmony (Java SE), Directory (ApacheDS LDAP), Felix (OSGi R4 Service), iBATIS (data mapper Java/.NET/Ruby), Roller (blog server).