Grafico is a small javascript library in order to let you create clean and minimalist charts.

Choosing a javascript charting library is a difficult task. These libraries often include a bunch of features you won’t use, and the produced results are sometimes a graphical overkill. Well, Grafico‘s goal is to produce simple and clean charts.

Some features :

• Line graphs
• Area graphs
• Stacked area graphs
• Stream graphs
• Bar graphs
• Stacked bar graphs
• Horizontal bar graphs
• Sparklines
• Sparkbars
• Sparkareas

demo - http://grafico.kilianvalkhof.com/
requierments – prototype.js,  raphaël
license – MIT

Highcharts JS is a charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application.

Highcharts JS currently supports line, spline, area, areaspline, column, bar, pie and scatter chart types. It works in all modern browsers including the iPhone and Internet Explorer from version 6. Setting the Highcharts configuration options requires no special programming skills. The options are given in a JavaScript object notation structure, which is basically a set of keys and values connected by colons, separated by commas and grouped by curly brackets. On hovering the chart, Highcharts JS can display a tooltip text with information on each point and series. By zooming in on a chart you can examine an especially interesting part of the data more closely. Zooming can be in the X or Y dimension, or both. Highcharts is licensed under a Creative Commons Attribution-NonCommercial 3.0 License.

http://www.highcharts.com/