Java.sun.com 
Sun's home for Java. Offers Windows, Solaris, and Linux Java Development Kits (JDKs), extensions, news, tutorials, and product information.
http://java.sun.com/Sun Opens Java
Press release and links covering the open-sourcing of key Java implementations by Sun Microsystems.
http://www.sun.com/2006-1113/feature/
The Apache Jakarta Project
Offers a set of open source Java solutions under an open software license. Jakarta is organized into subprojects.
http://jakarta.apache.org/
Wikipedia: Java
Presents the language and gives insight into its philosophy and syntax. Lists criticism, resources, links and literature on the topic.
http://en.wikipedia.org/wiki/Java_(programming_language)
Java Open Source Software
A directory of open source software focused on Java.
http://java-source.net
