Tomaz Kastrun has a nice collection of useful R packages for data scientists:
Among thousand of R packages available on CRAN (with all the mirror sites) or Github and any developer’s repository.
Many useful functions are available in many different R packages, many of the same functionalities also in different packages, so it all boils down to user preferences and work, that one decides to use particular package. From the perspective of a statistician and data scientist, I will cover the essential and major packages in sections. And by no means, this is not a definite list, and only a personal preference.
Click through for Tomaz’s recommendations.