Microsoft has released a collection of free charting controls for both ASP.NET and Windows Forms. These controls will only work with the .NET Framework 3.5. These are basically the Dundas Chart controls, Microsoft has acquired Dundas a while back and now you get these for free 🙂

Download links

Microsoft Chart Controls for Microsoft .NET Framework 3.5

Microsoft Chart Controls for .NET Framework Documentation

Microsoft Chart Controls Add-on for Microsoft Visual Studio 2008