Java is a high-level object-oriented language developed by Sun Microsystems that is compiled into a format called bytecode, which can then be executed by a Java interpreter, included in most operating systems in the Java Virtual Machine (JVM).

• GNU Compiler for Java (GCJ) - OSS tool that can compile: Java source code directly to native machine code, Java source code to Java bytecode (class files), and Java bytecode to native machine code
• Java Boutique: Free Java Applets, Games, Programming Tutorials and Downloads
• Java in Administration Special Interest Group (JA-SIG) - independent organization designed to increase the flow of information between educational institutions and companies involved in the development of administrative applications using Java technology
• Java Objects in XML (JOX) - set of Java libraries to transfer data between XML documents and Java beans
• JavaWorld - monthly online publication
• Kaffe - cleanroom, open source implementation of a Java virtual machine and class libraries
• Sun's Java Site