Telerik RadChart is a business-oriented charting component with a focus on development productivity and ease-of-use. It can generate all popular types of charts, which allows you to display data in a people-friendly manner. Version 3.1 maintains a Secondary Y-axis which is particularly useful for showing two series of data with different magnitude in one scale.
||Free to try
||Windows 2000/XP/2003 Server/Vista, Microsoft.NET Framework 1.0, IIS 5.0