The package smisc contains utility functions without focus on a specific topic.
There is no CRAN version available yet.
Once a CRAN version will be availabe you should be able to install the released version of smisc from CRAN with:
install.packages("smisc")
The development version from GitHub with:
# install.packages("devtools")
devtools::install_github("sebastian-gerdes/smisc")
library(smisc)
## basic example code
square(9)
#> [1] 81