Yasai - YASAI is an open-source Monte Carlo simulation add-in for Microsoft Excel
Invantive Control for Excel - Invantive Control enables you to make decisions with Microsoft Excel and yet remain fully compliant...
@RISK - @RISK is the world's most widely used risk analysis tool.
CData Excel Add-Ins - Excel Add-In for mass imports / exports / updates, data cleansing & de-duplication and data analysis.
MC FLO - MC FLO is a add-in which make it easier to make decisions using the Monte-Carlo simulation approach.
ASAP Utilities - ASAP Utilities is a powerful Excel add-in that fills the gaps in Excel.