Simulacra
One-way data binding for web applications.
Joint
JavaScript diagramming library
Fancy Select
A better select for discerning web developers everywhere.
Minified.js
Replace jQuery or MooTools with a <4kB Library
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
Pure
PURE Unobtrusive Rendering Engine for HTML
Dragend
dragend JS – a touch ready, full responsive, content swipe script
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.
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.
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.
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