An implementation of the Grammar of Graphics in R

dplyr: A grammar of data manipulation

Dynamic Documents for R

Machine Learning in R

caret (Classification And Regression Training) R package that contains misc functions for training and plotting classification and regression models

Improve the readability of R code with the pipe

Make working with dates in R just that little bit easier

Interactive grammar of graphics for R

A fresh approach to string manipulation in R

Excerpt from the Gapminder data, as an R data package and in plain text delimited form