A user interface library for development of Web applications. It provides a terminal independent component model that can be adapted to different terminal types and user interface themes. [Open source, LGPL]

An extension to the Jakarta struts framework that provides a powerful caching facility for actions and views [Open Source, BSD-like]

A fully functional standalone transaction manager that implements the XA protocol and is compliant with the JTA APIs. [Open Source, BSD-like]

A library of generic implementations of core J2EE patterns and practices and packaging tools essential for building/composing Web-based, XML-driven, EJB-JavaBean-JSP tier J2EE applications. [Open source, LGPL]

Chuck Cavaness takes a whirlwind tour of the Struts framework, with overviews of many of it most important features.

A Java/XML-based software platform which allows for rapid business system integration with little or no custom programming.

A Java framework designed to encourage development of modular, reusable, and independent units of business logic. [Open source, MPL]

A web application framework for J2EE. It is based on a concept called "Pull HMVC" (Pull Hierarchical Model View Controller). It supports an arrange of view technologies - XSLT, JSP, Velocity, Applet. [Open source]

A asynchronous peer-to-peer message framework for binary, text, and record-oriented message passing that includes memory management of queues and dynamic discovery of remote readers. [Open source, GPL]

A complete implementation of the core J2EE design patterns; a collection of independent components/services brought together as one cohesive framework. Site includes download, services and support overview. [Open source, GPL]