I found these addins for Excel, thought they might be useful to someone.

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<A target="_blank" HREF=http://home.uchicago.edu/~rmyerson/addins.htm>SIMTOOLS and FORMLIST</A>

Simtools.xla and Formlist.xla are add-ins for Microsoft Excel (version 5 and later). Simtools adds statistical functions and procedures for doing Monte Carlo simulation and risk analysis in spreadsheets. Formlist is a simple auditing tool that adds procedures for displaying the formulas of any selected range. Also available here is Torndiag.xls, an Excel workbook for making "tornado" sensitivity-analysis diagrams. Simtools and Formlist were developed to facilitate applications of probability and statistics, and to help managers do complex decision analysis. These programs are distributed as freeware for individual use, and may be freely redistributed to students and faculty in an academic institution. All other rights are reserved.
For current information after July 2001, see the new UChicago web site for Simtools and Formlist.