GlassFish is a freeware server software which implements the newest features in the Java EE 5 platform (the next version of the J2EE platform).

The Java EE 5 platform includes the latest versions of technologies such as Enterprise JavaBeans (EJB) 3.0, JavaServer Faces (JSF) 1.2, Servlet 2.5, JavaServer Pages (JSP) 2.1, Java API for Web Services (JAX-WS) 2.0, Common Annotations 1.0, Streaming API for XML (StAX) 1.0, Java Architecture for XML Binding (JAXB) 2.0, Java Persistence 1.0, and many other new technologies.

Here are some key features of "GlassFish":

· An open, modular, extensible platform
· A fast, easy, reliable application server
· An enterprise-ready application server with massive scalability and sophisticated administration
· Product updates and add-ons through the industry-strength Update Center 2.0
· Support for OSGi
· Support for dynamic languages such as Ruby and Groovy
· Support for Java EE 6