Good packages

Data managment

• reshape2 Useful melt() and dcast() function
• dplyr Easy data managment
• tidyr Successor of reshape2 to be used along with dplyr
• readr Fast import of datasets
• readxl Fast reading of .xls and .xlsx files
• deSolve ODE solver
• Rcpp Run compiled C++ code in R
• zoo Useful na.locf() function
• fmatch faster version of match()

Interactivity

• manipulate Generate sliders as in berkeley madonna
• Shiny Create web apps

Plots

• diagrammeR Creation of network diagrams
• ggplot2 Easily create nice graphics
• lattice Alternative to ggplot2
• ggvis Interactive ggplot2
• plot.ly Another interactive ggplot2
• ggpairs Correlation matrices that look like ggplot2
• gridExtra Useful functions for ggplot2 and lattice
• latticeExtra Nice ggplot2like() function
• xpose4 Diagnostic plots for NONMEM

Reports

• knitr Create .html, .doc or .pdf while running R code
• rmarkdown Use the mardown language in R
• xtable Tables for Latex repports
• ReporteRs Generate powerpoints from R