Distributions Package
The Distributions package provides a large collection of probabilistic distributions and related functions. Particularly, Distributions implements:
Moments (e.g mean, variance, skewness, and kurtosis), entropy, and other properties
Probability density/mass functions (pdf) and their logarithm (logpdf)
Moment generating functions and characteristic functions
Maximum likelihood estimation
Posterior w.r.t. conjugate prior, and Maximum-A-Posteriori (MAP) estimation