Underscore
JavaScript's utility _ belt
Socket.io
Realtime application framework for Node.JS, with HTML5 WebSockets and cross-browser fallbacks support.
Hoodie.js
hoodie super power to the frontend!
Codedoc
Create beautiful modern documentation websites.
Mark.js
JavaScript keyword highlighting. Mark text with options for diacritics, synonyms, custom elements, custom class names, separate word search (multiple terms), filter selectors, accuracy and iframes. Also available as jQuery plugin. Compatible with DataTables.
Litegl.js
Lightweight Javascript WebGL library for handling Context, Meshes, Textures and Shaders. Relies on glMatrix 2.0, very easy to use.
Foo Table
jQuery plugin to make HTML tables responsive
Bounce.js
Create beautiful CSS3 powered animations in no time.
Vue Flow Form
Create conversational conditional-logic forms with Vue.js.
Photo Swipe
PhotoSwipe is a HTML/CSS/JavaScript based image gallery specifically targeting mobile touch devices
No Ui Slider
noUiSlider is a lightweight JavaScript range slider library. It offers a wide selection of options and settings, and is compatible with a ton of (touch) devices, including those running iOS, Android, Windows 8 and Windows Phone 8.
Speak.js
Text-to-Speech in JavaScript using eSpeak
Gijgo
Gijgo - Free Javascript Controls
Tiny Slider
Vanilla javascript slider for all purposes.
Juxtapose
JuxtaposeJS is a JavaScript library for making before/after image sliders
Rest
RESTful HTTP client for JavaScript
Fast Json Patch
Lean and mean Javascript implementation of the JSON-Patch standard (RFC 6902). Update JSON documents using delta patches.