Play Framework is a lightweight and modular web application framework for Java. It is designed to be fast and easy to use, with a focus on developer productivity. It includes features for building RESTful APIs, web sockets, and more.

8. Apache Wicket

Apache Wicket is a lightweight web application development framework for Java. It provides a component-based programming model that simplifies the process of building web applications. With Wicket, developers can focus on the business logic of their application, while the framework handles the presentation layer.