Brick
UI Web Components for Mobile Web Apps
Pushy
Pushy is a responsive off-canvas navigation menu using CSS transforms & transitions
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.
Mobiscroll
The customizable HTML5 spinner/scroller control for touch devices like smartphones and tablets
Vux
Mobile UI Components based on Vue & WeUI
Responsible
Responsible.js - Give visitors the choice of what mobile experience they want. Adds Toggle for mobile to desktop switching without page reloads
Ratchet
Prototype iPhone apps with simple HTML, CSS, and JS components.
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).
Drawer
A small CSS3 and jQuery plugin for app style drawer menu.
Dragend
dragend JS – a touch ready, full responsive, content swipe script
Swipe
a lightweight mobile slider
Agile
Agile Css3 Engine
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).
Tiny Nav.js
Responsive navigation plugin that weighs just 443 bytes
Slidebars
Slidebars is a jQuery framework for quickly and easily implementing app style off-canvas space into your website.
Pointer.js
Pointer.js consolidates pointer-like input models across browsers and devices.
React Native
A framework for building native apps with React.