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.