The highcharter Package The highcharter package link by Joshua Kunst has long been my favorite data visualization package in R. It created a wonderful API to the famous JS Highcharts library. link. Although Highcharts is not free for commercial use, but I found many functionality of it is unparalleled with other visualization packages like ploty or sunburstR or r2d3.
For example, you can easily create an interactive scatterplot with ggplot2 like syntax: