Application Request Routing (ARR) is an extension to Internet Information Server (IIS), which enables an IIS server to function as a load balancer.
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
Vaadin is an open-source framework for building user interfaces and single-page applications using Java and TypeScript.