R for Windows

Subdirectories:

base
Binaries for base distribution. This is what you want to install R for the first time.

contrib
Binaries of contributed CRAN packages (for R >= 3.4.x).

old contrib
Binaries of contributed CRAN packages for outdated versions of R (for R < 3.4.x).

Rtools
Tools to build R and R packages. This
is what you want to build your own packages on Windows, or to build R itself.

Please do not submit binaries to CRAN. Package developers might want to contact Uwe Ligges directly in case of questions / suggestions related to Windows binaries.

You may also want to read the R
FAQ and R for Windows FAQ.

Note: CRAN does some checks on these binaries for viruses, but
cannot give guarantees. Use the normal precautions with downloaded
executables.