JSF is a component-based framework for building user interfaces for web applications in Java. It provides a set of reusable UI components that can be used to build web pages quickly and easily.

5. GWT (Google Web Toolkit)

GWT is an open-source Java software development framework that enables developers to create complex browser-based applications. It provides a set of reusable UI components and widgets, as well as tools for building, testing, and deploying applications.