React - A JavaScript library for building user interfaces
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
Vue.js - Reactive Components for Modern Web Interfaces
Guava - Google core libraries for Java 6+.
Webix UI - An enterprise JavaScript Library for cross-platform app development with HTML5 JavaScript widgets and easy integration with most popular JavaScript Frameworks.
RxJava - RxJava – Reactive Extensions for the JVM is a library for composing asynchronous and event-based programs using observable sequences.