DASL is an online library of datafiles & stories that illustrate the use of basic statistics methods.
A metasite of freely accessible multi-platform statistical software; includes access to calculators, plotters, random number generators, & programs that perform literally hundreds of calculations.
SISA will perform several statistical analyses, distributions, and calculations via the Internet, including T-test, Fisher Exact, Correlation, Poisson, and Significance. Simply select the procedure and fill in the form to perform the analysis.