Featherlight
Featherlight is a very lightweight jQuery lightbox plugin. It's simple yet flexible and easy to use. Featherlight has minimal css and uses no inline styles, everything is name-spaced, it's completely customizable via config object and offers image, ajax and iframe support out of the box. Featherlights small footprint weights about 4kB – in total.
Sylvester
Vector, matrix and geometry math JavaScript
FloraJS
FloraJS is a JavaScript framework for simulating natural systems in a web browser.
Math Box.js
MathBox is a (work in progress) library for making presentation-quality math diagrams in WebGL.
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Sequence
The Responsive Slider with Advanced CSS3 Transitions
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
Scene Graph.js
HTML5 Canvas and Animation Framework
Unveil
A very lightweight jQuery plugin to lazy load images
Philogl
A WebGL Framework for Data Visualization, Creative Coding and Game Development
Magnific Popup
Light and responsive lightbox plugin with focus on performance.
Intense Images
A simple library to view large images up close using simple mouse interaction, and the full screen.
Ejecta
A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS
Slit Slider
A responsive slideshow with a twist: the idea is to slice open the current slide when navigating to the next or previous one. Using jQuery and CSS animations we can create unique slide transitions for the content elements.
Xeogl
A WebGL-based 3D engine for technical visualization.
Noisy
A jQuery plugin that adds random noise to the background of a given element.
Graphicsjs
A lightweight JavaScript graphics library with the intuitive API, based on SVG/VML technology.