High Quality Content by WIKIPEDIA articles! SailFin is an open-source Java application server project led by Sun Microsystems. It implements the JCP SIP Servlet 1.1 (JSR 289) specification integrated with the open-source Java EE application server GlassFish. SailFin effectively extends the GlassFish application server to meet the needs of communication and multimedia applications. By leveraging GlassFish as a basis, SailFin offers management, HA and clustering features along with the performance and scale to meet critical service-deployments.