Anvil
Anvil is a Java based server environment and object oriented programming language with templating support, being especially well-suited to for web applications.

Chrysalis
Chrysalis is a Java web development framework. It has a different focus from most Model-View-Controller (MVC) web frameworks. Chrysalis controllers resemble normal Java classes with multiple methods. Client request URLs are mapped to each controller method.

Cocoon
Apache Cocoon is a web development framework built around the concepts of separation of concerns and component-based web development. Cocoon implements these concepts around the notion of 'component pipelines', each component on the pipeline specializing on a particular operation. This makes it possible to use a Lego(tm)-like approach in building web solutions, hooking together components into pipelines without any required programming.

Echo
Echo is a framework for developing object-oriented, event-driven Web applications. Echo removes the developer from having to think in terms of "page-based" applications and enables him/her to develop applications using the conventional object-oriented and event-driven paradigm for user interface development. Knowledge of HTML, HTTP, and JavaScript is not required.

Jaffa
Jaffa (Java Application Framework For All) is an enterprise-focused Java framework for rapid application development.

Japple
Japple is a rapid application development environment for building web applications and services. Built on the JavaTM2 Platform and open-standards, Japple allows you to develop and deploy web applications faster, easier and more efficiently than traditional methods.

Jucas
Jucas is a web-framework which brings together the pull MVC concept with component orientated design GUI programming.

Maverick
Maverick is a Model-View-Controller (aka "Model 2") framework for web publishing using Java and J2EE. It is a minimalist framework which focuses solely on MVC logic, allowing you to generate presentation using a variety of templating and transformation technologies.

Millstone
Millstone is a user interface library for development of networked Java applications. It provides a terminal independent component model that can be adapted to different terminal types and user interface themes.

MyFaces
JavaServer(tm) Faces is a new and upcoming web application framework that accomplishes the MVC paradigm. It is comparable to the well-known Struts Framework but has features and concepts that are beyond those of Struts.