Google Chart API – The Google Chart API lets you dynamically generate charts. To see the Chart API in action, open up a browser window and copy the following URL into the address bar:
Open Flash Chart – Open Flash Chart is a Flash charting component. It is fairly easy to setup and has classes written in PHP, Perl, Python, Java, Ruby on Rails, and .Net to connect to the Chart. You can create some really nice looking Bar Charts, Pie Charts, Area Charts and etc…
AmCharts – AmCharts are animated interactive flash charts. The charts include Pie Charts, Line Charts, Scatter/Bubble Charts, Bar/Column Charts, and even a stock chart. AmCharts can extract data from simple CSV or XML files, or they can read dynamic data generated with PHP, .NET, Java, Ruby on Rails, Perl and ColdFusion. All the charts are free but they have a link to AmCharts on the upper left.
XML/SWF Charts – XML/SWF Charts is a simple, yet powerful tool to create attractive charts and graphs from XML data. Create an XML source to describe a chart, then pass it to this tool’s flash file to generate the chart. The XML source can be prepared manually, or generated dynamically using any scripting language (PHP, ASP, CFML, Perl, etc.) XML/SWF Charts makes the best of both the XML and SWF worlds. XML provides flexible data generation, and Flash provides the best graphic quality.
Visifire – Visifire (Powered by Silverlight) is a set of open source data visualization components. With Visifire you can create animated Silverlight Charts with ASP, ASP.Net, PHP, JSP, ColdFusion, Ruby on Rails or just simple HTML.
FusionCharts – FusionCharts is a cross-browser and cross-platform flash charting component that can be used with ASP.NET, ASP, PHP, JSP, ColdFusion, Ruby on Rails, simple HTML pages or even PowerPoint Presentations. All you need to know is the language you’re programming in.
JFreeChart – JFreeChart is an open source Java chart library that makes it easy for developers to display quality charts in their applications. The JFreeChart project was founded seven years ago, in February 2000, by David Gilbert and is used by approximately 40,000 to 50,000 developers. JFreeChart supports many different output types that includes JPEG, GIF, PDF, EPS and SVG. This is a great resource for Java developers.