Apache
Apache Geronimo, Apache JServ Project, Geronimo Live, Just Go, The Jakarta Project, Tomcat, Tomcat Basics, Tomcat User Mailing List
JBoss
Eclipse + Tomcat + JBoss + MySQL 3.x, Hello, World! Web App, JBoss, JBoss FAQ, Learno, Q&A: Behind the Story at JBoss
Accendia Iris Application Server
Offers synchronous, asynchronous and client callback communication models as well as integrated application security and communication security. [Free for developers and for personal use]
Blazix Java Application Server
An app server with support for EJB, JSP and servlets. Includes EJB Wizards, JSP library, and JSP debugging support.
Borland Enterprise Server AppServer Edition
J2EE application server built on top of Borland VisiBroker. [Commercial]
Cape Connect
Web services platform that supports J2EE, SOAP, WDSL and UDDI. [Commercial]
Gefion LiteWebServer
Small, easy-to-use Java web server and servlet runner, based on Apache Tomcat. [Open Source, BSD-like]
GNU-Paperclips
Servlet API 2.1 servlet container. It provides HTTP/1.1 compliance and has an easy to use admin interface. [Open Source, GPL]
Helma Object Publisher
An Java based application server which is using ECMA-Script as its scripting language. [Open source, BSD style license]
Java Skyline - Servers
Comprehensive list of Java enterprise servers - which ones run JSP, servlet, EJB and who makes them.
JEAS
A Java embedded application server, following OSGi specification. By Coternet Technology. [Shareware]
Jetty
HTTP Server with Servlet support, written in 100% Java. [Open Source]
JOnAS (Java Open Application Server)
Open source EJB container from ObjectWeb. Includes mailing list, forums, documentation, download and source. [Open source, LGPL license]
JRun
Servlet engine that allows the development and deployment of Java Servlets and JavaServer Pages. [Commercial]
Laszlo Systems Inc.
Has developed an XML-native platform for deploying rich Internet applications into any browser.
OpenEJB
EJB container, pluggable into commercial middleware servers. [Open Source]
Oracle Application Server
It provides an architecture for developing and deploying business and commerce applications. By Oracle Corporation.
Orion Application Server
A pure java full-featured application-server that supports J2EE and EJB 1.1 [Commercial]
Puakma Tornado Server
A Java application server and framework for complex web application development.
Resin
Java based XSL focused on dynamic server pages. This Java servlet engine supports JavaScript and JavaServer Pages (JSP). It also compiles JavaScript templates into Java byte code. [Commercial]
s-integrator
A "light-weight", adaptable integration server that rapidly integrates services from various systems.
Sun Java Embedded Server
Dynamic, real-time, life-cycle control for the creation, deployment and installation of applications and services. [Commercial]
Trifork Enterprise Application Server
A Java 2 Enterprise Edition (J2EE) application server.
Webkool
Includes source, documentation, downloads, and mailing list. [Open Source, LGPL]
WISE Server
A total web infrastructure product. Allows the hosting on multiple j2EE on a single machine. WISE is designed for large intranets or demanding internet sites. By SMart Frameworks Limited.