History.js
History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.
Regl
👑 Functional WebGL
Bxslider 4
Responsive jQuery content slider
Lovefield
Lovefield is a relational database for web apps. Written in JavaScript, works cross-browser. Provides SQL-like APIs that are fast, safe, and easy to use.
X Editable
In-place editing with Twitter Bootstrap, jQuery UI or pure jQuery
Chartkick
Create beautiful Javascript charts with one line of Ruby
At.js
Add Github like mentions autocomplete to your application.
URI.js
Javascript URL mutation library
jQuery Autocomplete
Ajax Autocomplete for jQuery allows you to easily create autocomplete/autosuggest boxes for text input fields.
Dagre
Directed graph renderer for javascript
Hoodie.js
hoodie super power to the frontend!
Whitestorm.js
WhitestormJS physics + rendering of 3D
Flight
A lightweight, component-based JavaScript framework
Magic
CSS3 Animations with special effects
Bacon.js
FRP (functional reactive programming) library for Javascript
Stats.js
JavaScript Performance Monitor
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models