Data Analysis Plugin, Addins, Function.. Please Help!

Hi,

I am an analyst, I am using Pivot table, Filters & cond. formatting for data analysis in Excel . I would like to know that, What are the other feature/add-ins/Plug-in exist in excel which is useful for data analysis. Please Help. Thanks in advance.

It really depends on the type of results you'd like to portray. I find this add-in useful in my charts:

XY Chart Labeller (http://www.appspro.com/Utilities/Utilities.htm)