Popup calendar component

I was looking for good calendar component for my pet project, which must have feature to show calendar with pop-up. ;-) Googling gave me several links. Some of them were javascript based and some were written in C#. None of them were promising. While looking into some more links, I came to know about this site. Along with calendar componet I was looking for, there are several interesting components in this site. Also, there is a deployment tool for ASP.NET application known as 'Unleashed It'. Above all, every thing is FREE, except source.