R is a free software environment for statistical computing and graphics. It compiles and runs on a wide variety of UNIX platforms, Windows and MacOS. The site below will provide more information about the project and software, links to download the software (Comprehensive R Archive Network), and links to mailing lists and other resources (manuals, books, FAQs, and The R Journal).
TIP: One of the best ways to find publications related to R in the Library Catalogue is to do a Subject search for "r computer program language"