Chart.js - A JavaScript Library For Easy Graphs For Designers & Developers

Chart.js is a JavaScript library which allows you to create graphs for the client-side easily using an object-oriented approach. Chart.js provides 6 ways of representing your data, with each being animated and fully customizable.

Chart.js can display your data in form of line charts, bar charts, radar charts, pie charts, polar area charts, and donut charts. The library uses HTML5 Canvas to display the graphs and has polyfills for IE7/8.

Chart.js is also very lightweight and dependency free, weighing in at only 4.5KB (minified & gizpped).

Requirements: None
Website: http://www.chartjs.org/
Demo: http://www.chartjs.org/
License: MIT License

Intro.js - A JavaScript Library For Tour Guides For Websites

Intro.js is a JavaScript library for guided tours for your websites. It uses data attributes within your HTML to feed the library with the data needed to operate.

You can navigate through the tour using mouse and keyboard shortcut keys. The library makes use of overlays and popups to focus the user’s attention to the proper part of the page being toured.

Intro.js is lightweight, weighing in at 7KB, with #KB of CSS code. Intro.js is supported in all modern browsers, including IE8+.

Requirements: None
Website: http://usablica.github.io/intro.js/
Demo: http://usablica.github.io/intro.js/
License: MIT License