Grafico is an open source JavaScript charting library built with Raphaël & Prototype.js.

It is possible to create multiple types of charts like line, area, bar & stacked charts, sparklines and more.

Grafico

Each chart type has numerous API options to customize it’s look & behavior.

Charts created with Grafico can, optionally, be interactive which means they can provide data when hovered, clicked, etc.

The library is well-documented & supported with examples.