Introduction to R
There are commercial statistics packages, SAS, SPSS (now belongs to IBM), JMP, Minitab. All of these packages are expensive. There are some open source packages you can try out. Most of these packages can be found here 1, 2. In this article, we will focus on discussing R.
(1) Want to get started in a matter of seconds? Wikipedia article is the way to go.
(2) There is a R journal specializing on discussing the statistics research and latest R package.
(4) Tired of using the command line for R? Try ESS, a nice graphic interface for R.
(6) A powerful collection of R packages, CRAN.