Simulacra
One-way data binding for web applications.
Joint
JavaScript diagramming library
Minified.js
Replace jQuery or MooTools with a <4kB Library
Fancy Select
A better select for discerning web developers everywhere.
Jail
JqueryAsynchImageLoader Plugin for jQuery
Hc Sticky
Dependency free javascript library that makes any element on your page visible while you scroll.
Dragscroll
tiny library for drag-n-drop scrolling style
Phina.js
phina.js is game library
Dragend
dragend JS – a touch ready, full responsive, content swipe script
Pure
PURE Unobtrusive Rendering Engine for HTML
Responsive Elements
Responsive elements makes it possible for any element to adapt and respond to the area they occupy. It's a tiny javascript library that you can drop into your projects today.
Animatelo
Animatelo is a bunch of cool, fun, and cross-browser animations for you to use in your projects. This is a porting to Web Animation API of the fabulous animate.css project.
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.
Flexie
Legacy support for the CSS3 Flexible Box Model
Contra
Asynchronous flow control with a functional taste to it
Ass
A JavaScript ASS subtitle format renderer
Tiny Nav.js
Responsive navigation plugin that weighs just 443 bytes