Statgraphics (Statistical Graphics Corporation)

This firm's main product is "Statgraphics," a full-featured statistical package. It includes "exploratory data analysis, histograms, box-and-whisker plots, one sample analysis, two-sample comparisons, regression and multiple regression, analysis of variance, and sample size selection." It can also deal with censored and uncensored data. As one might expect from its name, Statgraphics has very strong graphical features. Besides product information, this site offers a demo version, contact information, and links to statistical sites.