R is designed for statistical computing and graphic technologies. it's simple to be extended by itself and c,c++ language.r is an official part of free software foundation's gnu projects, so it's not for profit organization in the public interest.R can be deployed on all the platforms and there are abundant documents about r language in its website and the internet.
more information you can refer to if u are interested on the lightweight but powerful language environment is listed as following.

homepage: http://www.r-project.org/
download mirror in china: http://mirrors.geoexpat.com/cran/