Aja.js
Ajax without XML : Asynchronous JavaScript and JavaScript/JSON(P)
Snabbt.js
Fast animations with javascript and CSS transforms
Victor
A JavaScript 2D vector class with methods for common vector operations
Kendo Ui Core
Kendo UI Core
Somajs
Scalable javascript framework
Vivus
JavaScript library to make drawing animation on SVG
Fast Json Patch
Lean and mean Javascript implementation of the JSON-Patch standard (RFC 6902). Update JSON documents using delta patches.
Pace
Automatically add a progress bar to your site. #hubspot-open-source
Ampersand
Quickest way to get started with ampersand.
Power Array
Boosted Performance Array
jQuery.mb.yt Player
use a custom youtube player for a video as background on jQuery framework
Svg Morpheus
JavaScript library enabling SVG icons to morph from one to the other. It implements Material Design's Delightful Details transitions.
Gitdown
GitHub markdown preprocessor.
101
A modern JS utility library
Uikit
A lightweight and modular front-end framework for developing fast and powerful web interfaces.
Mimosa
A lightning-fast, modular, next generation browser development tool.
Ol3
OpenLayers 3