| Apache Geronimo 
The goal of the Geronimo project is to produce a server runtime
framework that pulls together the best Open Source alternatives to
create runtimes that meet the needs of developers and system
administrators. Our most popular distribution is a fully certified J2EE
1.4 application server runtime. We are working on our next version of
the server which is based on Java EE 5.
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| Apache Tomcat
Apache Tomcat is the servlet container that is used in the official
Reference Implementation for the
Java Servlet and JavaServer Pages technologies.
The Java Servlet and JavaServer Pages specifications are developed by Sun
under the Java
Community Process.
Apache Tomcat is developed in an open and participatory environment and
released under the Apache
Software License. Apache Tomcat is intended to be a collaboration of the
best-of-breed developers from around the world. We invite you to
participate in this open development project. To learn more about getting
involved, click here.
Apache Tomcat powers numerous large-scale, mission-critical web applications
across a diverse range of industries and organizations. Some of these users
and their stories are listed on the
PoweredBy wiki page.
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| Enhydra
Enhydra Server is an Open Source Java application and webservice server
including standard Apache Tomcat (or alternatively Jetty) and Apache
Axis with a very big difference ! While the servlet API is used to
support presentation logic, the platform contains just about all
enterprise level services to build extreme high volume web sites in an
n-tier architecture. The architecture is designed for perfomance and in
tests we showed incredible performance numbers ! Many Enhydra servers
are powering the Web today, some catering to millions of transactions a
day. One of the most talked about features of Enhydra is its Enhydra
XMLC technology - an object-oriented standards based replacement for
JSP that completely separates the designer and developer. In addition,
Enhydra includes a relational-to-object mapping tool (Enhydra DODS),
Enhydra Workflow (Shark and JaWE), clustering web server extensions for
Apache, IIS and IPlanet and much more.
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| GlassFish
The GlassFish community is building free,
open source,
production-quality,
enterprise software.
The main deliverables are an Application Server,
the
Java EE 5 Reference Implementation,
and the Java Persistence API Reference Implementation,
TopLink Essentials.
The community also delivers
Maven Repository,
tools and much more.
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| JBoss
The JBoss Enterprise
Middleware Suite delivers a cohesive suite of market-leading open
source middleware products that can be used alone, mixed and matched,
or combined to build and deploy applications, business processes, and
Web services.
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| Jetty
Jetty is a 100% Java HTTP
Server and Servlet Container. This means that you do not need to
configure and run a separate web server (like Apache) in order to use
java, servlets and JSPs to generate dynamic content. Jetty is a fully
featured web server for static and dynamic content. Unlike separate
server/container solutions, this means that your web server and web
application run in the same process, without interconnection overheads
and complications. Furthermore, as a pure java component, Jetty can be
simply included in your application for demonstration, distribution or
deployment. Jetty is available on all Java supported platforms.
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| JOnAS
JOnAS is a leading edge Open Source implementation by OW2 of the Java EE specification.
The stable versions are J2EE 1.4 certified. The License used by JOnAS is the LGPL.
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| Mobicents 
Mobicents is a highly scalable event-driven application server with a
robust component model and fault tolerant execution environment.
Mobicents is the first and only Open Source Platform certified
for JSLEE compliance. It complements J2EE to enable convergence of
voice, video, instant messaging and data in next generation intelligent
applications.
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| SpikeSource
SpikeSource offers enterprise class solutions by integrating
applications and middleware into a single package, supported and
managed through SpikeNet.
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| Suneido
Suneido is a complete, integrated application platform -
a system for developing and deploying applications without the
frustrations of integrating multiple different products. Suneido
incorporates an object-oriented programming language, client-server relational database software, and application frameworks and components.
It includes the integrated development environment (IDE) used to create
applications as well as the client and server required to run
applications across networks. Suneido is Open Source - it is provided free, with complete source code.
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| WSO2
WSO2 is a Open Source technology company building Open Source
middleware platforms for Web services and SOA. WSO2 delivers integrated
middleware stacks based on components developed at Apache, offering
industry leading performance and convenience for customers.
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| Zope
Zope is an open source
application server for building content management systems, intranets,
portals, and custom applications. The Zope community consists of
hundreds of companies and thousands of developers all over the world,
working on building the platform and Zope applications. Zope is written
in Python, a highly-productive, object-oriented scripting language.
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The List 
