ZRandom for Excel. Better RNG. 16 distributions, use from Excel, VBA or menu.

ZRandom implements high quality random number generation for Microsoft Excelusing the Merssenne Twister algorithm : * Use higher quality pseudo-random numbers than the Excel RAND() and VBA Rnd() functions. * Generate random numbers from 16 discrete and continuous distributions. ZRandom implements the following discrete distributions: Uniform, Bernoulli, Geometric, Hypergeometric, Negative Binomial and Poisson. ZRandom implements the following continuous distributions: Beta, Burr, Exponential, Gamma, Lognormal, Normal, Pareto, Triangular, Uniform and Weibull. * Create large batches of random numbers using the interactive user interface. * Excel functions for use in spreadsheet formulas. * A VBA interface to generate random numbers in your code. * Generate random samples from a table or random sort existing data.