1)   StatAssist 2.0
StatAssist displays graphs and related properties of more than 40 probability distributions. It calculates statistical moments, quantiles, and tail probabilities depending on the distribution parameters specified by the user.

 2)   SLGallery 1.2
Use this unique probability distribution calculation toolbox featuring 11 continuous and 4 discrete functions to plot graph and find values for probability density, cumulative distribution (CDF), survival and Hazard functions. Download for FREE!