RStan is the R interface to Stan.

Home Page

RStan's home page, with links to everything you'll need to use RStan and Stan is:

http://mc-stan.org/

RStan Getting Started

https://github.com/stan-dev/rstan/wiki/RStan-Getting-Started

Source Repository

RStan's source-code repository is hosted here on GitHub. Stan's source repository is defined as a submodule here, see how to work with stan submodule in rstan repo.

Licensing

RStan is licensed under GPLv3. The Stan code packaged in RStan is licensed under new BSD.