itracker is an open source issue tracking system built using Java enterprise technology.

Vaadin is an Open Source Java web application framework designed for creating web based rich and interactive applications. No HTML, XML or JavaScript necessary and all Java libraries and tools are at your disposal.

opentaps is a Java Open Source ERP and CRM system with integrated Open Source business intelligence. It is designed to bring together all parts of your organization, so that you can work together more effectively and make better business decisions. Because opentaps is open source ERP & CRM, you can download, modify, use, and distributed for free.

jHepWork is a full-featured multi-platform open source data analysis framework for scientists, engineers, and students. All numerical and graphical libraries written in Java are fully integrated with Jython. jHepWork comes with a powerful Python/Jython friendly IDE with a code assist.

Art of Illusion is a free, open source 3D modeling and rendering studio. This is stable and powerful enough to be used for serious, high end animation work. Many of its capabilities rival those found in commercial programs. Some of the highlights include subdivision surface based modeling tools, skeleton based animation, and a graphical language for designing procedural textures and materials.

It is written entirely in Java, and should be usable on any Java Virtual Machine which is compatible with Java 5 or later.

Red5 is an open source Flash Real Time Messaging Protocol (RTMP) server written in Java. Red5 is considered as a free alternate to Adobe Flash Media Server, and supports many of the same feature sets. It has a few additional feature sets such as the ability to intercept live streams, and the ability to easily plug in other Java libraries such as Hibernate.

If you’re a Java or a C++ Developer who needs to programatically manipulate video files, either pre-recorded, or live, then Xuggler is for you.

The Xuggler is a free and open-source library for Java or C++ developers that allows you to decode, manipulate, and encode (almost) any type of video file in near real time. It is for programmers who want to add video processing support to their products.

The Xuggler also comes with a Red5 integration library which allows Java developers to modify and re-broadcast live video on the fly using Red5. This means you can write server-side applications that modify video, without any special client software on your customer’s web browsers.

Website: http://www.xuggle.com/xuggler/

JavaFX is a rich client platform, integrated with Java Runtime, that you can create and deliver rich internet experiences.

It is the a combination of a scripting language: JavaFX Script, a rich client platform and set of tools for a productive and collaborative developer-designer workflow.

You can refer JavaFX as alternative for Flash & Silverlight.

JavaFX platform currently consists:

• NetBeans IDE 6.5 for JavaFX 1.0 (development environment)
• JavaFX 1.0 Production Suite (a set of tools & Photoshop & Illustrator pluging allowing graphics to be exported to JavaFX applications)

JavaFX can run on millions of devices including desktop, browsers, mobile devices & more as it requires Java Runtime which is ready on many environments.

Requirements: Java Runtime

Website: http://www.javafx.com/

Demo: http://www.javafx.com/samples

Alfresco is an open source enterprise level CMS application.

It provides document management, collaboration (in beta), records management, knowledge management, web content management and imaging.

Alfresco is built with Java & can be installed in both Window & Linux environments via “all-in-one installers”.

Some features of Alfresco:

• Web Content Management
  • Web content authors can access and contribute content
  • Simply preview in-context changes to any web page or web application
  • Reduce the risk of error with simple a virtualization of changes against a live site
  • Use your tool of choice, such as Dreamweaver, for web interface development
  • The ability to preview in-context changes to any web application, including PHP, Ruby, JSF, Tiles, Struts, Groovy and .NET
• Document Management
  • All content is available via a shared drive interface
  • All content is available from within MS Office
  • Work in an MS Office environment for authoring and viewing
  • Save, version, share, search and audit
  • & many more..

This application is great for any company who wants to manage all the information from one central including websites, documents & knowledge.

Requirements: Java Enabled Server

Liferay, with 60 tools and a selection of today’s most innovative technologies, enables you to do everything like:

• Creating websites.
• Building intranets.
• Simply getting the right documents and applications to the right people.

Liferay inlcudes web publishing, content management, collaboration and social networking.

With the role-based authorization, admins & users can define which information can be viewed by which users.

A strong set of community features help creating communities, user groups & they can have their own mini-portals.

Some other included features are: wikis, forums, instant messenger, calendar, webmail, blogs & more.

And, any other applications like accounting, sales can be integrated with its open architecture.

The application is “giant” with the features it offers & hard to describe its capabilities completely. Users interested in creating an enterprise portal should definitely check it.

Requirements: Supports multiple OSs, applications servers & databases.