gRaphaël’s will help you create stunning charts on your website. It supports Firefox 3.0+, Safari 3.0+, Opera 9.5+ and Internet Explorer 6.0+.
D3.js is a not a traditional visualization framework which allows you to apply data-driven transformations to the document. For example, you can use D3 to generate a basic HTML table from an array of numbers. Or, use the same data to create an interactive SVG bar chart with smooth transitions and interaction.
Flot is a plotting library for jQuery. It produces graphical plots of arbitrary datasets on-the-fly client-side. The focus is on simple usage (all settings are optional), attractive looks and interactive features like zooming and mouse tracking.