R Packages
Lots of libraries called packages:
Basic packages (included with the distribution): base, datasets, grDevices, graphics, grid, methods, splines, stats, stats4, tcltk, tools, utils
http://cran.r-project.org/doc/FAQ/R-FAQ.html#Which-add_002don-packages-exist-for-R_003f
Add-on packages from lots of others (including commercial packages such as https://plot.ly/ Links to an external site.)
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Transcript
Now, I mentioned that statisticians are using R, and one of the key things is people produce so-called "R packages" for doing sets of functions. So, for instance, for plotting, for accessing databases, for computing splines, etcetera etcetera. And you can get a lot of packages, including finding out about commercial packages for R at the URL on the slide.