AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
w2ui - W2UI is a small JavaScript UI library with a complete set of widgets: layout, grid, sidebar, toolbar, tabs, fields, popup, utilities.
Vue.js - Reactive Components for Modern Web Interfaces
Svelte - Cybernetically enhanced web apps
React - A JavaScript library for building user interfaces
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.