Ionic
Advanced HTML5 Mobile App Framework. A beautiful front-end framework for developing hybrid mobile apps in HTML5. Best friends with AngularJS.
Tiny Nav.js
Responsive navigation plugin that weighs just 443 bytes
Shake.js
A custom 'shake' event plugin for mobile web browsers using device accelerometer.
Jo
Jo is a thin (~12K) candy shell for PhoneGap apps. It's an HTML5 mobile app framework which provides UI widgets, a flexible event model, a wrapper for sound, and a light data layer. Apps are skinnable with CSS3, and work everywhere PhoneGap does... and then some, including Adobe Air and OSX (desktop and dashboard).
Pep
Pep, a lightweight jQuery plugin for kinetic drag on mobile/desktop
iScroll
Smooth scrolling for the web
Media Check
Control JS with mediaqueries
Slidebars
Slidebars is a jQuery framework for quickly and easily implementing app style off-canvas space into your website.
Touch Swipe jQuery Plugin
TouchSwipe is a jquery plugin to be used with jQuery on touch input devices such as iPad, iPhone etc.
Native Script
NativeScript is an open source framework for building truly native mobile apps with JavaScript. Use web skills, like Angular and Vue.js, FlexBox and CSS, and get native UI and performance on iOS and Android.
Tabris Js
tabris.js - native apps in JavaScript
Pushy
Pushy is a responsive off-canvas navigation menu using CSS transforms & transitions
Pressure
:point_down::boom: JavaScript library for handling Force Touch, 3D Touch, and Pointer Pressure.
Jquery UI
The official jQuery user interface library.
Device.js
Device.js makes it easy to write conditional CSS and/or JavaScript based on device operating system (iOS, Android, Blackberry, Windows, Firefox OS), orientation (Portrait vs. Landscape), and type (Tablet vs. Mobile).
Snap.js
A Library for creating beautiful mobile shelves in Javascript
Ratchet
Prototype iPhone apps with simple HTML, CSS, and JS components.