Polymodes for the R language:

• poly-noweb+R-mode
• poly-markdown+R-mode
• poly-rapport-mode
• poly-html+R-mode
• poly-brew+R-mode
• poly-R+C++-mode
• poly-C++R-mode
• poly-ess-help+R-mode
• poly-Rd-mode

Weavers:

• knitr
• knitr-ESS
• `Sweave-ESS
• Sweave

Exporters:

• Rmarkdown
• Rmarkdown-ESS
• Rbookdown-ESS
• Shiny
• Shiny-ESS

RMarkdown templates available through ESS menus and on M-n M-m in Rmd files (poly-r-rmarkdown-create-from-template):