Free Statistics and Forecasting Software. See www.wessa.net.
Descriptive Statistics Software
Statistical Hypothesis Testing Software
Time Series Analysis (R modules)
Statistics Education at Simon Fraser University
Statistics Education at Aston University
Multiple Regression Software (C module)
Scientific Forecasting Software (C modules)
Sample Size Software (sample size, sample accuracy, confidence interval)
Factor Analysis (Factor Analysis, Principal Components)
Clustering Software (Agglomerative Nesting, Hierarchical Clustering)
Financial Calculators (page not available as of 27SEP2010)