Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
Slate
A completely customizable framework for building rich text editors.
Photo Swipe
PhotoSwipe is a HTML/CSS/JavaScript based image gallery specifically targeting mobile touch devices
Moment
Parse, validate, manipulate, and display dates in javascript.
JsRender
A light-weight but powerful templating engine, highly extensible, without DOM or jQuery dependency.
Dygraphs
Interactive visualizations of time series using JavaScript and the HTML canvas tag. The dygraphs JavaScript library produces interactive, zoomable charts of time series.
Scroll Magic
The jQuery plugin for magical scroll interactions.
Request
Simplified HTTP request client.
Imba
The new programming language for web apps
Rivets
Declarative data binding facility
Fastdom
Eliminates layout thrashing by batching DOM read/write operations
Bootstrap Slider
A less buggy "fork" of the original bootstrap slider found on http://www.eyecon.ro/ by Stefan Petre. It was forked so we could update the slider since the original wasn't under version control.
Jeeliz Ar
JavaScript object detection lightweight library for augmented reality (WebXR demos included). It uses convolutional neural networks running on the GPU with WebGL.
Trace Kit
Attempts to create stack traces for unhandled JavaScript exceptions in all major browsers.
Tone.js
A Web Audio framework for making interactive music in the browser.
Spectrum
The No Hassle JavaScript Colorpicker
Jszip
Create, read and edit .zip files with Javascript