GlassFish is a full-blown
Java EE 5 implementation. It's an open source application server, much like
JBoss. It's web services support is done via JAX-WS 2.0. GlassFish v2 is in the works (beta soon). If you're into using rather a supported product, Sun Application Server 9.0 is just a productized version of GlassFish 1 (9.1 will be built on GlassFish v2).
GlassFish home page:
https://glassfish.dev.java.net/ [ January 10, 2007: Message edited by: Alexis Moussine-Pouchkine ]