Tell your readers how long they'll need to get through all of your gibberish  Demo

An easy to use HTML5 JavaScript Charting library built on Canvas element. Charts can render across devices including iPhone, iPad, Android, Windows Phone, Desktops, etc. This allows you to create rich dashboards that can work across devices without compromising on maintainability or functionality of your web application. Graphs include several good looking themes and are 10x faster than conventional Flash / SVG based Libraries – resulting in lightweight, beautiful and responsive dashboards.

A little slideshow with a color palette creation effect using CSS Filters and Vibrant.js .

Extract prominent colors from an image. Vibrant.js is a javascript port of the awesome Palette class in the Android support library.  Demo

A responsive tour snippet, with a step-by-step guide to help users understand how to use your website. 

It as a full-screen off-screen menu on (a)steroids.
It is an HTML5/Css3 responsive solution for using (and making) animated large off-screen menus. It uses CSS transitions that are hardware accellerated and much faster then jQuey animations.
It comes packed with presets (20 responsive presets and 30 presets for the editor), included Visual Editor and it is compatible with all modern desktop (HTML5) and mobile browsers (Android and iOS).

Animated alerts are the jQuery plugin based on css3 animation. Using it you can effectively communicate to users the right information. There are 68 animations, multiple color themes and types of messages and detailed documentation. Also you can develop your own themes, because of the efficient organization of the code. The plugin works in all modern browsers and on all devices. 

Responsive miller columns  Demo

Loads images, background images, scripts, styles, iframes, videos and audios asynchronously (just 260 bytes).  Demo

Calculates if the mouse position is near to a given element.  Demo