RStan is the R interface to Stan.
For installation instructions and other tips on getting started with RStan see
Several Stan users have also contributed translations of the RStan Getting Started page:
RStan's source code repository is hosted here on GitHub. Stan's source repository is defined as a submodule. See how to work with stan submodule in rstan repo.
RStan is licensed under GPLv3. The Stan code packaged in RStan is licensed under new BSD.