I like using the helpful ReactJS. It is a JavaScript library for user interfaces.
I never heard of it.
How about Sencha Touch which is another JavaScript. 
Never heard of it either; i'm a basic computer user.
Well Sencha Touch is a JavaScript library for user interfaces on the web and to develop apps.
I'm curious i will do some research.
Ext JS
Ext JS is a pure JavaScript application framework for building interactive cross platform web applications using techniques such as Ajax, DHTML and DOM scripting. It can be used as a simple component framework (to e.g. create dynamic grids on otherwise static pages), but also as a full framework for building single-page applications.
Originally built as an add-on library extension of YUI by Jack Slocum on April 15, 2007, beginning with version 1.1, Ext JS retains no dependencies on external libraries, instead making
Sencha Touch
Sencha Touch is a user interface (UI) JavaScript library, or web framework, specifically built for the Mobile Web. It can be used by Web developers to develop user interfaces for mobile web applications that look and feel like native applications on supported mobile devices. It is based on web standards such as HTML5, CSS3 and JavaScript. The goal of Sencha Touch is to facilitate quick and easy development of HTML5 based mobile apps which run on Android, iOS, Windows, Tizen and BlackBerry devices, simultaneously allowing