Swig
Take a swig of the best template engine for JavaScript.
Sound JS
A Javascript library for working with Audio. Features a simple interface as the front end to multiple audio APIs via a plugin model. Currently supports HTML5 Audio & Flash.
Slick Grid
A lightning fast JavaScript grid/spreadsheet
Signal R
Incredibly simple real-time web for .NET
Rusha
High-performance pure-javascript SHA1 implementation suitable for large binary data, reaching up to half the native speed.
PreloadJS
PreloadJS makes preloading assets & getting aggregate progress events easier in JavaScript. It uses XHR2 when available, and falls back to tag-based loading when not.
Multiscroll.js
multiscroll plugin by Alvaro Trigo. Create full screen pages with two scrolling sections per page.
Mootools Core
MooTools Core Repository
Jasny Bootstrap
The missing components for your favorite front-end framework.
Intense Images
A simple library to view large images up close using simple mouse interaction, and the full screen.
Gitgraph.js
A JavaScript library to draw pretty git graphs in the browser
Backbone.stickit
Backbone data binding, model binding plugin. The real logic-less templates.
Alloy Ui
Alloy is a UI metaframework that provides a consistent and simple API for building web applications across allthree levels of the browser: structure, style and behavior.
Formvalidation
The best @jquery plugin to validate form fields. Designed to use with Bootstrap + Zurb Foundation + Pure + Semantic UI + UIKit + Your own frameworks. Star it. Try it. Buy it :)
Focal Point
A small set of CSS classnames to help keep images cropped on the focal point for responsive designs. Using only HTML/CSS, web authors can specify an image's focal point, which stays as the image's primary focus, while the image's available width changes on responsive webpages. Crop and re-size images depending on available width and let CSS to do all of the work, and without any JavaScript.
Flot
Flot is a pure JavaScript plotting library for jQuery, with a focus on simple usage, attractive looks and interactive features.
Obelisk.js
JavaScript Engine for Building Isometric Pixel Element with HTML5 Canvas