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).
Visibility.js
Visibility.js allows you to determine whether your web page is visible to a user, is hidden in background tab or is prerendering. It allows you to use the page visibility state in JavaScript logic and improve browser performance by disabling unnecessary timers and AJAX requests, or improve user interface experience (for example, by stopping video playback or slideshow when user switches to another browser tab).
Cxjs
CxJS - Advanced JavaScript UI framework for admin and dashboard applications with ready to use grid, form and chart components.
Timeline JS
TimelineJS: A Storytelling Timeline built in JavaScript.
Ratchet
Prototype iPhone apps with simple HTML, CSS, and JS components.
Qooxdoo
A Universal JavaScript Framework
Csso
CSS-optimizer
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Gmaps
the easiest way to use Google Maps
Headroom.js
Give your pages some headroom. Hide your header until you need it
Gulp
The streaming build system
Flippant.js
A mini dependancy-less UI lib for flipping over DOM nodes.
Blitz
⚡️The Fullstack React Framework — built on Next.js
Fattable
Javascript Library to create scrollable table with infinite rows and columns.
Klass
a utility for creating expressive classes in JavaScript
Winjs
WinJS project by Microsoft Open Technologies