Math Box.js
MathBox is a (work in progress) library for making presentation-quality math diagrams in WebGL.
jQuery Instagram
Instagram jQuery plugin
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Galen
Layout and functional testing framework for websites
Drawer
A small CSS3 and jQuery plugin for app style drawer menu.
Poly
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
Bootstrap Progressbar
progressbar interactions for twitter bootstrap 2 & 3
Go Js
All GoJS samples, extensions, and documentation
jVectorMap
Show interactive vector maps on the web.
Cutjs
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
Lazy Line Painter
A jQuery plugin for SVG path animation
Img Liquid
jQuery plugin to resize images to fit in a container.
Somajs
Scalable javascript framework
jQuery Gantt
jQuery Gantt Chart
Nuclear Js
Reactive Flux built with ImmutableJS data structures. Framework agnostic.
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.
Bootstrap Contextmenu
Context menu plugin for Twitter's Bootstrap framework