phytools provides functions for phylogenetic comparative biology; as well as several other functions for tree inference, manipulation, and analysis that are not implemented in other R packages.
The complete list of functions can be displayed with library(help = phytools)
.
More information on phytools can be found at http://www.phytools.org or http://blog.phytools.org.
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.