Covervid
Make your HTML5 video behave like a background cover image with this lightweight Javascript plugin / jQuery extension
Auto Numeric
autoNumeric is a jQuery plugin that automatically formats currency (money) and numbers as you type on form inputs. It supports most International numeric formats and currency signs including those used in Europe, North and South America, Asia and India (lakhs**).
Amplitudejs
A Javascript library that allows you to control the design of your media controls in your webpage -- not the browser. No dependencies (jQuery not required)
Prime
an OOP javascript library for node.js and the browsers
Power Array
Boosted Performance Array
CSS Parent Selector
CSS4 parent selector based on jQuery
Queen
A platform for running scripts on many browsers
Probability.js
Probability.js makes it easy to call JavaScript functions by probability in Node.js and the browser.
Is Near
Calculates if the mouse position is near to a given element.
Kefir
A Reactive Programming library for JavaScript
Thrill
Runs tests in many browsers.
Optics
Profunctor implementation of Lenses, Prisms, Traversals, Isos, etc.
JS Movieclip
A javascript little framework to animate spritesheet as AS3 movieclip
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Stapes
a (really) tiny Javascript MVC microframework
Screenlog.js
Bring console.log on the screen
Objgrep
Find strings inside complicated javascript objects