1. The document compares several open source application servers that can be used for Java enterprise applications, including JBoss, GlassFish, SpringSource dm Server, Geronimo, and Tomcat. 2. It provides an overview of each application server and discusses their strengths and weaknesses. 3. The document concludes by providing recommendations on which application server may be best based on factors like whether EJBs are used, support for technologies like Spring and OSGi is needed, and preferences around stability versus cutting-edge features.