XLMiner is the only comprehensive data mining add-in for Excel, with neural nets, classification and regression trees, logistic regression, linear regression, Bayes classifier, K-nearest neighbors, discriminant analysis, association rules, clustering, principal components, and more.

XLMiner provides everything you need to sample data from many sources -- PowerPivot, Microsoft/IBM/Oracle databases, or spreadsheets; explore and visualize your data with multiple linked charts; preprocess and 'clean' your data, fit data mining models, and evaluate your models' predictive power.

http://www.solver.com/xlminer-data-mining
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