In-Source Documentation for R (roxygen2)
A ‘Doxygen’-like in-source documentation system for Rd, collation, and ‘NAMESPACE’ files.

R Google Analytics (rga)
This is a package for extracting data from Google Analytics into R.

Thematic Maps (tmap)
Thematic maps are geographical maps in which statistical data are visualized. This package offers a flexible, layer-based, way to create thematic maps, such as choropleths and bubble maps.