RDocumentation-package
                        Integrate R with RDocumentation.org
check_package           Check if a package is installed for the user.
defaults                Settings
documentation           Documentation on RDocumentation or via the
                        normal help system if offline
get_package_from_URL    Get package URL
hideViewer              Redirects the viewer to the RDocumentation help
                        page.
install_package         Install a package from CRAN, BioConductor, or
                        GitHub
