JBoss is an application server written in Java that can host business components developed in Java. The interface and architecture of the JBoss application server, the Java business components that can be hosted inside JBoss and various protocols by which a client application (or other business components) can interact with the business components is defined by the Enterprise JavaBeans specification.

JBoss 2 is designed to be an EJB v1.1 container and server. Some parts of EJB 2.0 are supported in the 2.4.x versions, for example Message Driven Beans

Alfresco is the first open source enterprise-scale document management system that includes a modern content repository, an out-of-the-box portal framework for managing and using content designed to work with standard portals, and a groundbreaking Common Internet File System (CIFS) interface that provides Microsoft Windows file system compatibility. Alfresco takes the lessons of building document management systems for the last 15 years and applied them to build an open source content management system that is easier to use, more scalable and more adaptable.

A new kid on the block when it comes to open source enterprise search. The company must still provide some evidence of a real open source strategy: frequent release of open source code & strong community would be appreciated.

A Java-based, full-featured, multi-blog, multi-user software package.

SearchBlox is a content search software designed for vertical search, intranets, websites, portals and custom-applications. It is based on Lucene and Carrot2.

At the heart of Autonomy's infrastructure software lies the Intelligent Data Operating Layer (IDOL) Server. The IDOL Server collects indexed data from connectors and stores it in its proprietary structure, optimized for fast processing and retrieval of data. As the information processing layer, IDOL forms a conceptual and contextual understanding of all content in an enterprise, automatically analyzing any piece of information from over 1,000 different content formats and even people's interests. Over 500 operations can be performed on digital content by IDOL, including hyperlinking, agents, summarization, taxonomy generation, clustering, eduction, profiling, alerting and retrieval.

Ext GWT is a Java library for building rich internet applications with the Google Web Toolkit (GWT)

Cayenne is a powerful, full-featured, opensource framework created for developers working with relational databases. it seamlessly maps any relational database to Java objects, reducing development time and adding considerable functionality to any application which requires a database. Developers using Cayenne will be able to concentrate on the core business requirements and the data model instead of the SQL details. The application can then be easily moved to any JDBC-capable database. In addition to management of persistent Java objects mapped to relational databases, Cayenne provides a plethora of features including single method call queries and updates (including atomic updates of all modified objects), seamless integration of multiple databases into a single virtual data source, three tier persistence with caching on the remote client, paging of results, record locking, and many more features. JPA compliance is in progress.

WildCAT is a Java toolkit/framework to make applications context-aware. It provides a simple and dynamic data model to represent the execution context of the application, which can be accessed both synchronously and synchronously (pull and push).