Bar and pie Charts in .net 4.0

Hi All,

I am using VS2010 Professional,

I want to Develop Bar and Pie Charts but unfortunately I am unable to Use ASP Chart Control in My Web App,It is in disable mode in my Data tab in Toolbox but able to use it in Windows app.

So I tried to  develop charts using Jquery but all are Licensed version or free trial for one month ,I want to develop charts by using  freeware or  opensource.

Please help me on this.

Thanks,

Ravi Kumar raju N.