restful

Implementation of RESTful API.

Jersey

RESTful framework is open source framework built upon a JAX-RS (JSR 311 & JSR 339) specification.

Grizzly

NIO framework has been designed to help developers to take advantage of the Java™ NIO API. 
Grizzly's goal is to help developers to build scalable and robust servers using NIO as well as offering extended framework components: Web Framework (HTTP/S), WebSocket, Comet.[1]

Netty

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.

Jetty

Jetty provides a Web server and javax.servlet container, 
plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.

Tomcat

The Apache Tomcat software is an open source implementation of the Java Servlet, 
JavaServer Pages, Java Expression Language and Java WebSocket technologies.

URLs

• RESTful micro frameworks