framework

Starter for building web, including RESTful, applications using Spring MVC. Uses Tomcat as the default embedded container

Spring Web provides integration features such as multipart file upload functionality and the initialization of the IoC container using Servlet listeners and a web-oriented application context. It also contains an HTTP client and the web-related parts of Spring remote support.

Spring webmvc contains Spring’s model-view-controller (MVC) and REST Web Services implementation for web applications. It provides a clean separation between domain model code and web forms and integrates with all of the other features of the Spring Framework.

Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

GWT User

Netty/All In One

Apache Felix Framework

Play

High-level API that greatly simplifies using ZooKeeper.

Spring Web Flow builds on Spring MVC and allows implementing the "flows" of a web application. A flow encapsulates a sequence of steps that guide a user through the execution of some business task.