A Java web application framework that takes simplicity, separation of concerns and ease of development to a whole new level. [Open source, Apache License]

Web application development framework to facilitate building secure web applications, based on and extending the Dash framework (see above). [Open Source, BSD-like]

Organizes web applications development into component-based framework. Requires Servlet API 2.2 and JDK 1.2. [LGPL]

An open source framework for building Servlet/JSP based web applications based on the Model-View-Controller (MVC) design paradigm [Open Source, BSD-like]

System for assembling components via configuration files. Documentation and downloads.

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]

An application server component framework, includes logging, thread pooling, and scheduling. [Apache]

An initiative to build an Open Source implementation for the JMXTM technology, specification version 1.1, and to build related tools. [Open source, Apache Software License ]

Offers a set of web controls (custom JSP tags, servlets, filters) for J2EE applications.

Integrates Java objects, XML documents, SQL relational databases and LDAP directories in a unified model that allows information to be exchanged, persisted and manipulated in a variety of ways. Supports JDO. [Open Source, BSD-like]