Calculator
 

Can anyone tell me if there is a calculator app out there that has customizable themes. Maybe I'm being picky but the calc that comes default destroys a theme of the phone once you open it. I know it's generally an afterthough of everyone, Microsoft hasn't changed the calculator from Windows 3.0 to Vista at all, so it doesn't surprise me how bad it is. I would just like something that doesn't jump out as bad when you click on it.

Thanks,