Some extra functionality that is not yet included in dplyr:
mutate_if
mutate selected rows (see tidyverse/dplyr#425)s_filter
,s_arrange
,... allowing string arguments (see tidyverse/dplyr#333)
To install in R, first install the package devtools from CRAN and then run
library(devtools);
install_github(repo="dplyrExtras", username="skranz")