Ninja UI
Ninja User Interface, the jQuery plugin for lethal interaction.
14 Alternatives To Ninja UI
Bootstrap
Simple and flexible HTML, CSS, and JS for popular UI components and interactions
DevExtreme
HTML5 Widgets & SPA Framework for Desktop and Mobile
Foundation
The most advanced responsive front-end framework in the world
Gijgo
Gijgo is a set of free open source javascript widgets distributed under MIT License.
GroundworkCSS
Responsive HTML5, CSS and JavaScript Framework
Modernizr
Modernizr is a JavaScript library which is designed to detect HTML5 and CSS3 features in various browsers.
PhoneGap
Easily create apps using the web technologies you know and love: HTML, CSS, and JavaScript.
Purecss
A set of small, responsive CSS modules that you can use in every web project.
React Native
A framework for building native apps with React
Semantic UI
A UI Component library implemented using a set of specifications designed around natural language
UIKit
A lightweight and modular front-end framework for developing fast and powerful web interfaces
jKit
A very easy to use, cross platform, jQuery based UI toolkit, that’s still small in size, has the features you need, and doesn’t get in your way of doing things!
jQuery
The Write Less, Do More, JavaScript Library.
w2ui
W2UI is a small JavaScript UI library with a complete set of widgets: layout, grid, sidebar, toolbar, tabs, fields, popup, utilities.