Vert.x

Vert.x is a toolkit for building reactive applications on the JVM. It provides a powerful, event-driven programming model that is designed to be scalable and efficient. Vert.x is built on top of the Netty library and provides a range of features for building modern web applications, including support for HTTP/2, WebSockets, and other modern web technologies. It is a powerful and flexible framework that can be used to build a wide range of applications, from simple REST APIs to complex web services. Vert.x is designed to be lightweight and modular, and provides an easy-to-use API for building scalable and efficient web applications. It is still in development, but it is already being used by many developers and companies to build modern and efficient web applications.