Looking for browser-based, end user ad-hoc reports

Hi all. We have need for an easy to use, browser based end-user reporting tool that can be hosted by CF10. We are spending a fantastic amount of time building custom tabular reports for our client and would prefer to give them a tool in our app that let's them build reports whenever they want. Do any of you know of any good reporting tools where the end-user could build their own reports?

Thanks for your help.

-Andy