ympes provides a collection of lightweight helper functions (imps) both for interactive use and for inclusion within other packages. These include functions for visualising colour palettes, quoting user input, working with age intervals and a set of minimal assertion functions.
You can install the released version of ympes from CRAN with:
install.packages("ympes")
The development version of ympes can be installed from GitHub with:
::install_github("TimTaylor/ympes") remotes
Image from Le grand Etteilla, ou, l’art de tirer les cartes. Author Simon Blocquel (1780–1863, under the pseudonym Julia Orsini). B+W version (and details) obtained from wikipedia.