As of 4/19/15 the caret package has the following dependencies:

• package ‘colorspace
• RColorBrewer
• dichromat
• munsell
• labeling
• minqa
• nloptr
• RcppEigen
• profileModel
• gtable
• scales
• proto
• iterators
• lme4
• brglm
• gtools
• ggplot2
• car
• foreach
• BradleyTerry2