Machine Learning
Many of these pages relate to R, the statistical programming environment. It's free and Open Source, and available for Windows, Linux, and so on.
Web pages
Tips for using R [link]
Some comments on multilinear regression [link]
A naïve implementation of Taylor-Butina clustering [link]
Information on various classification methods in R [link]
Calculating the bootstrap error in classification [link]
Using ipred for crossvalidation [link]